diff --git a/substrate/core/client/src/block_builder/api.rs b/substrate/core/client/src/block_builder/api.rs
index 3b8ceb6305..d122909eaf 100644
--- a/substrate/core/client/src/block_builder/api.rs
+++ b/substrate/core/client/src/block_builder/api.rs
@@ -16,19 +16,19 @@
 
 //! The runtime api for building blocks.
 
-use runtime_primitives::{traits::Block as BlockT, ApplyResult, InherentData, CheckInherentError};
+use runtime_primitives::{traits::Block as BlockT, ApplyResult, CheckInherentError};
 use rstd::vec::Vec;
 
 decl_runtime_apis! {
 	/// The `BlockBuilder` api trait that provides required functions for building a block for a runtime.
-	pub trait BlockBuilder {
+	pub trait BlockBuilder<InherentData> {
 		/// Apply the given extrinsics.
 		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyResult;
 		/// Finish the current block.
 		fn finalise_block() -> <Block as BlockT>::Header;
-		/// Generate inherent extrinsics.
+		/// Generate inherent extrinsics. The inherent data will vary from chain to chain.
 		fn inherent_extrinsics(inherent: InherentData) -> Vec<<Block as BlockT>::Extrinsic>;
-		/// Check that the inherents are valid.
+		/// Check that the inherents are valid. The inherent data will vary from chain to chain.
 		fn check_inherents(block: Block, data: InherentData) -> Result<(), CheckInherentError>;
 		/// Generate a random seed.
 		fn random_seed() -> <Block as BlockT>::Hash;
diff --git a/substrate/core/client/src/block_builder/block_builder.rs b/substrate/core/client/src/block_builder/block_builder.rs
index 7d5b867e3a..8656bfed53 100644
--- a/substrate/core/client/src/block_builder/block_builder.rs
+++ b/substrate/core/client/src/block_builder/block_builder.rs
@@ -16,6 +16,7 @@
 
 use super::api::BlockBuilder as BlockBuilderApi;
 use std::vec::Vec;
+use std::marker::PhantomData;
 use codec::Encode;
 use blockchain::HeaderBackend;
 use runtime_primitives::traits::{
@@ -28,18 +29,19 @@ use error;
 use runtime_primitives::ApplyOutcome;
 
 /// Utility for building new (valid) blocks from a stream of extrinsics.
-pub struct BlockBuilder<'a, Block, A: ProvideRuntimeApi> where Block: BlockT {
+pub struct BlockBuilder<'a, Block, InherentData, A: ProvideRuntimeApi> where Block: BlockT {
 	header: <Block as BlockT>::Header,
 	extrinsics: Vec<<Block as BlockT>::Extrinsic>,
 	api: ApiRef<'a, A::Api>,
 	block_id: BlockId<Block>,
+	_marker: PhantomData<InherentData>,
 }
 
-impl<'a, Block, A> BlockBuilder<'a, Block, A>
+impl<'a, Block, A, InherentData> BlockBuilder<'a, Block, InherentData, A>
 where
 	Block: BlockT<Hash=H256>,
 	A: ProvideRuntimeApi + HeaderBackend<Block> + 'a,
-	A::Api: BlockBuilderApi<Block>,
+	A::Api: BlockBuilderApi<Block, InherentData>,
 {
 	/// Create a new instance of builder from the given client, building on the latest block.
 	pub fn new(api: &'a A) -> error::Result<Self> {
@@ -72,6 +74,7 @@ where
 			extrinsics: Vec::new(),
 			api,
 			block_id: *block_id,
+			_marker: PhantomData,
 		})
 	}
 
@@ -79,12 +82,12 @@ where
 	/// can be validly executed (by executing it); if it is invalid, it'll be returned along with
 	/// the error. Otherwise, it will return a mutable reference to self (in order to chain).
 	pub fn push(&mut self, xt: <Block as BlockT>::Extrinsic) -> error::Result<()> {
-		fn impl_push<'a, T, Block: BlockT>(
+		fn impl_push<'a, T, Block: BlockT, InherentData>(
 			api: &mut ApiRef<'a, T>,
 			block_id: &BlockId<Block>,
 			xt: Block::Extrinsic,
 			extrinsics: &mut Vec<Block::Extrinsic>
-		) -> error::Result<()> where T: BlockBuilderApi<Block> {
+		) -> error::Result<()> where T: BlockBuilderApi<Block, InherentData> {
 			api.map_api_result(|api| {
 				match api.apply_extrinsic(block_id, &xt)? {
 					Ok(ApplyOutcome::Success) | Ok(ApplyOutcome::Fail) => {
diff --git a/substrate/core/client/src/client.rs b/substrate/core/client/src/client.rs
index 205827b6d4..60a68665ff 100644
--- a/substrate/core/client/src/client.rs
+++ b/substrate/core/client/src/client.rs
@@ -538,21 +538,21 @@ impl<B, E, Block, RA> Client<B, E, Block, RA> where
 	}
 
 	/// Create a new block, built on the head of the chain.
-	pub fn new_block(
+	pub fn new_block<InherentData>(
 		&self
-	) -> error::Result<block_builder::BlockBuilder<Block, Self>> where
+	) -> error::Result<block_builder::BlockBuilder<Block, InherentData, Self>> where
 		E: Clone + Send + Sync,
-		RA: BlockBuilderAPI<Block>
+		RA: BlockBuilderAPI<Block, InherentData>
 	{
 		block_builder::BlockBuilder::new(self)
 	}
 
 	/// Create a new block, built on top of `parent`.
-	pub fn new_block_at(
+	pub fn new_block_at<InherentData>(
 		&self, parent: &BlockId<Block>
-	) -> error::Result<block_builder::BlockBuilder<Block, Self>> where
+	) -> error::Result<block_builder::BlockBuilder<Block, InherentData, Self>> where
 		E: Clone + Send + Sync,
-		RA: BlockBuilderAPI<Block>
+		RA: BlockBuilderAPI<Block, InherentData>
 	{
 		block_builder::BlockBuilder::at_block(parent, &self)
 	}
diff --git a/substrate/core/consensus/rhd/src/lib.rs b/substrate/core/consensus/rhd/src/lib.rs
index 449f9c3ffa..135fbd03a2 100644
--- a/substrate/core/consensus/rhd/src/lib.rs
+++ b/substrate/core/consensus/rhd/src/lib.rs
@@ -196,7 +196,7 @@ pub trait BlockBuilder<Block: BlockT> {
 pub trait AuthoringApi:
 	Send
 	+ Sync
-	+ BlockBuilderAPI<<Self as AuthoringApi>::Block, Error=<Self as AuthoringApi>::Error>
+	+ BlockBuilderAPI<<Self as AuthoringApi>::Block, InherentData, Error=<Self as AuthoringApi>::Error>
 	+ Core<<Self as AuthoringApi>::Block, AuthorityId, Error=<Self as AuthoringApi>::Error>
 	+ OldTxQueue<<Self as AuthoringApi>::Block, Error=<Self as AuthoringApi>::Error>
 {
@@ -1174,7 +1174,7 @@ impl<C, A> BaseProposer<<C as AuthoringApi>::Block> for Proposer<C, A> where
 		let proposed_timestamp = match self.client.check_inherents(
 			&self.parent_id,
 			&unchecked_proposal,
-			&inherent
+			&inherent,
 		) {
 			Ok(Ok(())) => None,
 			Ok(Err(BlockBuilderError::TimestampInFuture(timestamp))) => Some(timestamp),
diff --git a/substrate/core/network/src/test/mod.rs b/substrate/core/network/src/test/mod.rs
index 603aaa9572..7f490a9459 100644
--- a/substrate/core/network/src/test/mod.rs
+++ b/substrate/core/network/src/test/mod.rs
@@ -234,7 +234,7 @@ impl<V: 'static + Verifier<Block>, D> Peer<V, D> {
 
 	/// Add blocks to the peer -- edit the block before adding
 	pub fn generate_blocks<F>(&self, count: usize, origin: BlockOrigin, mut edit_block: F)
-		where F: FnMut(BlockBuilder<Block, PeersClient>) -> Block
+		where F: FnMut(BlockBuilder<Block, (), PeersClient>) -> Block
 	{
 		use blocks::BlockData;
 
diff --git a/substrate/core/service/src/consensus.rs b/substrate/core/service/src/consensus.rs
index 240ba7dc49..2a7b96f199 100644
--- a/substrate/core/service/src/consensus.rs
+++ b/substrate/core/service/src/consensus.rs
@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
 
-//! provide consensus service to substrate.
+//! A consensus proposer for "basic" chains which use the primitive inherent-data.
 
 // FIXME: move this into substrate-consensus-common - https://github.com/paritytech/substrate/issues/1021
 
@@ -29,7 +29,7 @@ use consensus_common::{self, evaluation, offline_tracker::OfflineTracker};
 use primitives::{H256, AuthorityId, ed25519, Blake2Hasher};
 use runtime_primitives::traits::{Block as BlockT, Hash as HashT, Header as HeaderT, ProvideRuntimeApi};
 use runtime_primitives::generic::BlockId;
-use runtime_primitives::InherentData;
+use runtime_primitives::BasicInherentData;
 use transaction_pool::txpool::{self, Pool as TransactionPool};
 
 use parking_lot::RwLock;
@@ -60,16 +60,18 @@ pub trait AuthoringApi: Send + Sync + ProvideRuntimeApi where
 	fn build_block<F: FnMut(&mut BlockBuilder<Self::Block>) -> ()>(
 		&self,
 		at: &BlockId<Self::Block>,
-		inherent_data: InherentData,
+		inherent_data: BasicInherentData,
 		build_ctx: F,
 	) -> Result<Self::Block, error::Error>;
 }
 
-impl<'a, B, E, Block, RA> BlockBuilder<Block> for client::block_builder::BlockBuilder<'a, Block, SubstrateClient<B, E, Block, RA>> where
+impl<'a, B, E, Block, RA> BlockBuilder<Block>
+	for client::block_builder::BlockBuilder<'a, Block, BasicInherentData, SubstrateClient<B, E, Block, RA>>
+where
 	B: client::backend::Backend<Block, Blake2Hasher> + 'static,
 	E: CallExecutor<Block, Blake2Hasher> + Send + Sync + Clone + 'static,
 	Block: BlockT<Hash=H256>,
-	RA: BlockBuilderApi<Block>,
+	RA: BlockBuilderApi<Block, BasicInherentData>,
 {
 	fn push_extrinsic(&mut self, extrinsic: <Block as BlockT>::Extrinsic) -> Result<(), error::Error> {
 		client::block_builder::BlockBuilder::push(self, extrinsic).map_err(Into::into)
@@ -80,7 +82,7 @@ impl<B, E, Block, RA> AuthoringApi for SubstrateClient<B, E, Block, RA> where
 	B: client::backend::Backend<Block, Blake2Hasher> + Send + Sync + 'static,
 	E: CallExecutor<Block, Blake2Hasher> + Send + Sync + Clone + 'static,
 	Block: BlockT<Hash=H256>,
-	RA: BlockBuilderApi<Block>,
+	RA: BlockBuilderApi<Block, BasicInherentData>,
 {
 	type Block = Block;
 	type Error = client::error::Error;
@@ -88,7 +90,7 @@ impl<B, E, Block, RA> AuthoringApi for SubstrateClient<B, E, Block, RA> where
 	fn build_block<F: FnMut(&mut BlockBuilder<Self::Block>) -> ()>(
 		&self,
 		at: &BlockId<Self::Block>,
-		inherent_data: InherentData,
+		inherent_data: BasicInherentData,
 		mut build_ctx: F,
 	) -> Result<Self::Block, error::Error> {
 		let runtime_version = self.runtime_version_at(at)?;
@@ -119,7 +121,7 @@ pub struct ProposerFactory<C, A> where A: txpool::ChainApi {
 
 impl<C, A> consensus_common::Environment<<C as AuthoringApi>::Block> for ProposerFactory<C, A> where
 	C: AuthoringApi,
-	<C as ProvideRuntimeApi>::Api: BlockBuilderApi<<C as AuthoringApi>::Block>,
+	<C as ProvideRuntimeApi>::Api: BlockBuilderApi<<C as AuthoringApi>::Block, BasicInherentData>,
 	A: txpool::ChainApi<Block=<C as AuthoringApi>::Block>,
 	client::error::Error: From<<C as AuthoringApi>::Error>
 {
@@ -174,7 +176,7 @@ pub struct Proposer<Block: BlockT, C, A: txpool::ChainApi> {
 impl<Block, C, A> consensus_common::Proposer<<C as AuthoringApi>::Block> for Proposer<Block, C, A> where
 	Block: BlockT,
 	C: AuthoringApi<Block=Block>,
-	<C as ProvideRuntimeApi>::Api: BlockBuilderApi<Block>,
+	<C as ProvideRuntimeApi>::Api: BlockBuilderApi<Block, BasicInherentData>,
 	A: txpool::ChainApi<Block=Block>,
 	client::error::Error: From<<C as AuthoringApi>::Error>
 {
@@ -201,7 +203,7 @@ impl<Block, C, A> consensus_common::Proposer<<C as AuthoringApi>::Block> for Pro
 			)
 		}
 
-		let inherent_data = InherentData::new(timestamp, offline_indices);
+		let inherent_data = BasicInherentData::new(timestamp, offline_indices);
 
 		let block = self.client.build_block(
 			&self.parent_id,
diff --git a/substrate/core/service/test/src/lib.rs b/substrate/core/service/test/src/lib.rs
index 7ffa783e97..fdb39ed991 100644
--- a/substrate/core/service/test/src/lib.rs
+++ b/substrate/core/service/test/src/lib.rs
@@ -180,9 +180,9 @@ impl<F: ServiceFactory> TestNet<F> {
 	}
 }
 
-pub fn connectivity<F: ServiceFactory>(spec: FactoryChainSpec<F>) where
+pub fn connectivity<F: ServiceFactory, Inherent>(spec: FactoryChainSpec<F>) where
 	<F as ServiceFactory>::RuntimeApi:
-		client::block_builder::api::BlockBuilder<<F as service::ServiceFactory>::Block>
+		client::block_builder::api::BlockBuilder<<F as service::ServiceFactory>::Block, Inherent>
 {
 	const NUM_NODES: u32 = 10;
 	{
@@ -224,7 +224,7 @@ where
 	B: Fn(&F::FullService) -> ImportBlock<F::Block>,
 	E: Fn(&F::FullService) -> FactoryExtrinsic<F>,
 	<F as ServiceFactory>::RuntimeApi:
-		client::block_builder::api::BlockBuilder<<F as service::ServiceFactory>::Block> +
+		client::block_builder::api::BlockBuilder<<F as service::ServiceFactory>::Block, ()> +
 		client::runtime_api::TaggedTransactionQueue<<F as service::ServiceFactory>::Block>
 {
 	const NUM_NODES: u32 = 10;
@@ -263,7 +263,7 @@ pub fn consensus<F>(spec: FactoryChainSpec<F>, authorities: Vec<String>)
 where
 	F: ServiceFactory,
 	<F as ServiceFactory>::RuntimeApi:
-		client::block_builder::api::BlockBuilder<<F as service::ServiceFactory>::Block>
+		client::block_builder::api::BlockBuilder<<F as service::ServiceFactory>::Block, ()>
 {
 	const NUM_NODES: u32 = 20;
 	const NUM_BLOCKS: u64 = 200;
diff --git a/substrate/core/sr-primitives/src/lib.rs b/substrate/core/sr-primitives/src/lib.rs
index 86c93ab3d7..e07711668c 100644
--- a/substrate/core/sr-primitives/src/lib.rs
+++ b/substrate/core/sr-primitives/src/lib.rs
@@ -463,17 +463,17 @@ macro_rules! impl_outer_log {
 }
 
 //TODO: https://github.com/paritytech/substrate/issues/1022
-/// Inherent data to include in a block.
+/// Basic Inherent data to include in a block; used by simple runtimes.
 #[derive(Encode, Decode)]
-pub struct InherentData {
+pub struct BasicInherentData {
 	/// Current timestamp.
 	pub timestamp: u64,
 	/// Indices of offline validators.
 	pub consensus: Vec<u32>,
 }
 
-impl InherentData {
-	/// Create a new `InherentData` instance.
+impl BasicInherentData {
+	/// Create a new `BasicInherentData` instance.
 	pub fn new(timestamp: u64, consensus: Vec<u32>) -> Self {
 		Self {
 			timestamp,
diff --git a/substrate/core/test-client/src/block_builder_ext.rs b/substrate/core/test-client/src/block_builder_ext.rs
index 3c334b07a1..651559114a 100644
--- a/substrate/core/test-client/src/block_builder_ext.rs
+++ b/substrate/core/test-client/src/block_builder_ext.rs
@@ -29,9 +29,9 @@ pub trait BlockBuilderExt {
 	fn push_transfer(&mut self, transfer: runtime::Transfer) -> Result<(), client::error::Error>;
 }
 
-impl<'a, A> BlockBuilderExt for client::block_builder::BlockBuilder<'a, runtime::Block, A> where
+impl<'a, A> BlockBuilderExt for client::block_builder::BlockBuilder<'a, runtime::Block, (), A> where
 	A: ProvideRuntimeApi + client::blockchain::HeaderBackend<runtime::Block> + 'a,
-	A::Api: BlockBuilder<runtime::Block>
+	A::Api: BlockBuilder<runtime::Block, ()>
 {
 	fn push_transfer(&mut self, transfer: runtime::Transfer) -> Result<(), client::error::Error> {
 		self.push(sign_tx(transfer))
diff --git a/substrate/core/test-runtime/src/lib.rs b/substrate/core/test-runtime/src/lib.rs
index 50a0134e90..e3228cae3c 100644
--- a/substrate/core/test-runtime/src/lib.rs
+++ b/substrate/core/test-runtime/src/lib.rs
@@ -56,7 +56,7 @@ use runtime_primitives::{
 	traits::{
 		BlindCheckable, BlakeTwo256, Block as BlockT, Extrinsic as ExtrinsicT,
 		GetNodeBlockType, GetRuntimeBlockType
-	}, InherentData, CheckInherentError
+	}, CheckInherentError
 };
 use runtime_version::RuntimeVersion;
 pub use primitives::hash::H256;
@@ -220,7 +220,7 @@ impl_runtime_apis! {
 		}
 	}
 
-	impl block_builder_api::BlockBuilder<Block> for Runtime {
+	impl block_builder_api::BlockBuilder<Block, ()> for Runtime {
 		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyResult {
 			system::execute_transaction(extrinsic)
 		}
@@ -229,11 +229,11 @@ impl_runtime_apis! {
 			system::finalise_block()
 		}
 
-		fn inherent_extrinsics(_data: InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
+		fn inherent_extrinsics(_data: ()) -> Vec<<Block as BlockT>::Extrinsic> {
 			unimplemented!()
 		}
 
-		fn check_inherents(_block: Block, _data: InherentData) -> Result<(), CheckInherentError> {
+		fn check_inherents(_block: Block, _data: ()) -> Result<(), CheckInherentError> {
 			unimplemented!()
 		}
 
diff --git a/substrate/core/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.compact.wasm b/substrate/core/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.compact.wasm
index c9643519e9..62fa99174f 100644
Binary files a/substrate/core/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.compact.wasm and b/substrate/core/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.compact.wasm differ
diff --git a/substrate/node/cli/src/chain_spec.rs b/substrate/node/cli/src/chain_spec.rs
index fd53d64612..58ccc7dee0 100644
--- a/substrate/node/cli/src/chain_spec.rs
+++ b/substrate/node/cli/src/chain_spec.rs
@@ -330,6 +330,6 @@ mod tests {
 
 	#[test]
 	fn test_connectiviy() {
-		service_test::connectivity::<Factory>(integration_test_config());
+		service_test::connectivity::<Factory, node_primitives::InherentData>(integration_test_config());
 	}
 }
diff --git a/substrate/node/primitives/src/lib.rs b/substrate/node/primitives/src/lib.rs
index e9b32db752..e2336acafd 100644
--- a/substrate/node/primitives/src/lib.rs
+++ b/substrate/node/primitives/src/lib.rs
@@ -38,6 +38,8 @@ use runtime_primitives::generic;
 use primitives::bytes;
 use runtime_primitives::traits::{BlakeTwo256, self};
 
+pub use runtime_primitives::BasicInherentData as InherentData;
+
 /// An index to a block.
 pub type BlockNumber = u64;
 
diff --git a/substrate/node/runtime/src/lib.rs b/substrate/node/runtime/src/lib.rs
index 6abd5c2b05..b8ff92d1dd 100644
--- a/substrate/node/runtime/src/lib.rs
+++ b/substrate/node/runtime/src/lib.rs
@@ -63,7 +63,7 @@ use grandpa::fg_primitives::{self, ScheduledChange, id::*};
 use client::{
 	block_builder::api as block_builder_api, runtime_api::{self as client_api, id::*}
 };
-use runtime_primitives::{ApplyResult, CheckInherentError};
+use runtime_primitives::{ApplyResult, CheckInherentError, BasicInherentData};
 use runtime_primitives::transaction_validity::TransactionValidity;
 use runtime_primitives::generic;
 use runtime_primitives::traits::{
@@ -209,7 +209,8 @@ impl grandpa::Trait for Runtime {
 construct_runtime!(
 	pub enum Runtime with Log(InternalLog: DigestItem<Hash, SessionKey>) where
 		Block = Block,
-		NodeBlock = node_primitives::Block
+		NodeBlock = node_primitives::Block,
+		InherentData = BasicInherentData
 	{
 		System: system::{default, Log(ChangesTrieRoot)},
 		Timestamp: timestamp::{Module, Call, Storage, Config<T>, Inherent},
@@ -274,7 +275,7 @@ impl_runtime_apis! {
 		}
 	}
 
-	impl block_builder_api::BlockBuilder<Block> for Runtime {
+	impl block_builder_api::BlockBuilder<Block, BasicInherentData> for Runtime {
 		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyResult {
 			Executive::apply_extrinsic(extrinsic)
 		}
@@ -283,7 +284,7 @@ impl_runtime_apis! {
 			Executive::finalise_block()
 		}
 
-		fn inherent_extrinsics(data: runtime_primitives::InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
+		fn inherent_extrinsics(data: BasicInherentData) -> Vec<<Block as BlockT>::Extrinsic> {
 			let mut inherent = Vec::new();
 
 			inherent.extend(
@@ -302,8 +303,8 @@ impl_runtime_apis! {
 			inherent.into_iter().map(|v| v.1).collect()
 		}
 
-		fn check_inherents(block: Block, data: runtime_primitives::InherentData) -> Result<(), CheckInherentError> {
-			InherentData::check_inherents(data, block)
+		fn check_inherents(block: Block, data: BasicInherentData) -> Result<(), CheckInherentError> {
+			Runtime::check_inherents(block, data)
 		}
 
 		fn random_seed() -> <Block as BlockT>::Hash {
diff --git a/substrate/node/runtime/wasm/target/wasm32-unknown-unknown/release/node_runtime.compact.wasm b/substrate/node/runtime/wasm/target/wasm32-unknown-unknown/release/node_runtime.compact.wasm
index fb0d9a9d04..7c0b3a2619 100644
Binary files a/substrate/node/runtime/wasm/target/wasm32-unknown-unknown/release/node_runtime.compact.wasm and b/substrate/node/runtime/wasm/target/wasm32-unknown-unknown/release/node_runtime.compact.wasm differ
diff --git a/substrate/srml/support/src/inherent.rs b/substrate/srml/support/src/inherent.rs
index 8be51f4224..4b2443138c 100644
--- a/substrate/srml/support/src/inherent.rs
+++ b/substrate/srml/support/src/inherent.rs
@@ -18,7 +18,7 @@
 pub use rstd::{result::Result, vec::Vec};
 #[doc(hidden)]
 pub use runtime_primitives::{
-	traits::{ProvideInherent, Block as BlockT}, CheckInherentError, InherentData
+	traits::{ProvideInherent, Block as BlockT}, CheckInherentError
 };
 
 
@@ -40,62 +40,27 @@ pub use runtime_primitives::{
 #[macro_export]
 macro_rules! impl_outer_inherent {
 	(
-		$(#[$attr:meta])*
-		pub struct $name:ident where Block = $block:ident {
-			$( $module:ident: $module_ty:ident, )*
+		for $runtime:ident,
+			Block = $block:ident,
+			InherentData = $inherent:ty
+		{
+			$( $module:ident: $module_ty:ident,)*
 		}
 	) => {
-		impl_outer_inherent!(
-			$( #[$attr] )*
-			pub struct $name where Block = $block, Call = Call {
-				$( $module: $module_ty, )*
-			}
-		);
-	};
-	(
-		$(#[$attr:meta])*
-		pub struct $name:ident where Block = $block:ident {
-			$( $module:ident: $module_ty:ident, )*
-		}
-	) => {
-		impl_outer_inherent!(
-			$( #[$attr] )*
-			pub struct $name where Block = $block, Call = Call {
-				$( $module: $module_ty, )*
-			}
-		);
-	};
-	(
-		$(#[$attr:meta])*
-		pub struct $name:ident where Block = $block:ident, Call = $call:ident {
-			$( $module:ident: $module_ty:ident, )*
-		}
-	) => {
-		$( #[$attr] )*
-		#[derive(Encode, Decode)]
-		/// Inherent data to include in a block.
-		pub struct $name {
-			$( $module: <$module_ty as $crate::inherent::ProvideInherent>::Inherent, )*
-		}
-
-		impl $name {
-			/// Create a new instance.
-			pub fn new( $( $module: <$module_ty as $crate::inherent::ProvideInherent>::Inherent ),* ) -> Self {
-				Self {
-					$( $module, )*
-				}
-			}
-
+		impl $runtime {
 			fn check_inherents(
-				data: $crate::inherent::InherentData,
-				block: $block
+				block: $block,
+				data: $inherent
 			) -> $crate::inherent::Result<(), $crate::inherent::CheckInherentError> {
 				$(
 					<$module_ty as $crate::inherent::ProvideInherent>::check_inherent(
-						&block, data.$module, &|xt| match xt.function {
+						&block,
+						data.$module,
+						&|xt| match xt.function {
 							Call::$module_ty(ref data) => Some(data),
 							_ => None,
-						})?;
+						},
+					)?;
 				)*
 				Ok(())
 			}
diff --git a/substrate/srml/support/src/runtime.rs b/substrate/srml/support/src/runtime.rs
index 0376179e38..5fcd8c565b 100644
--- a/substrate/srml/support/src/runtime.rs
+++ b/substrate/srml/support/src/runtime.rs
@@ -53,7 +53,8 @@ macro_rules! construct_runtime {
 		pub enum $runtime:ident with Log ($log_internal:ident: DigestItem<$( $log_genarg:ty ),+>)
 			where
 				Block = $block:ident,
-				NodeBlock = $node_block:ty
+				NodeBlock = $node_block:ty,
+				InherentData = $inherent:ty
 		{
 			$( $rest:tt )*
 		}
@@ -62,6 +63,7 @@ macro_rules! construct_runtime {
 			$runtime;
 			$block;
 			$node_block;
+			$inherent;
 			$log_internal < $( $log_genarg ),* >;
 			;
 			$( $rest )*
@@ -71,6 +73,7 @@ macro_rules! construct_runtime {
 		$runtime:ident;
 		$block:ident;
 		$node_block:ty;
+		$inherent:ty;
 		$log_internal:ident <$( $log_genarg:ty ),+>;
 		$(
 			$expanded_name:ident: $expanded_module:ident::{
@@ -98,6 +101,7 @@ macro_rules! construct_runtime {
 			$runtime;
 			$block;
 			$node_block;
+			$inherent;
 			$log_internal < $( $log_genarg ),* >;
 			$(
 				$expanded_name: $expanded_module::{
@@ -125,6 +129,7 @@ macro_rules! construct_runtime {
 		$runtime:ident;
 		$block:ident;
 		$node_block:ty;
+		$inherent:ty;
 		$log_internal:ident <$( $log_genarg:ty ),+>;
 		$(
 			$expanded_name:ident: $expanded_module:ident::{
@@ -159,6 +164,7 @@ macro_rules! construct_runtime {
 			$runtime;
 			$block;
 			$node_block;
+			$inherent;
 			$log_internal < $( $log_genarg ),* >;
 			$(
 				$expanded_name: $expanded_module::{
@@ -192,6 +198,7 @@ macro_rules! construct_runtime {
 		$runtime:ident;
 		$block:ident;
 		$node_block:ty;
+		$inherent:ty;
 		$log_internal:ident <$( $log_genarg:ty ),+>;
 		$(
 			$expanded_name:ident: $expanded_module:ident::{
@@ -225,6 +232,7 @@ macro_rules! construct_runtime {
 			$runtime;
 			$block;
 			$node_block;
+			$inherent;
 			$log_internal < $( $log_genarg ),* >;
 			$(
 				$expanded_name: $expanded_module::{
@@ -257,6 +265,7 @@ macro_rules! construct_runtime {
 		$runtime:ident;
 		$block:ident;
 		$node_block:ty;
+		$inherent:ty;
 		$log_internal:ident <$( $log_genarg:ty ),+>;
 		$(
 			$name:ident: $module:ident::{
@@ -271,7 +280,6 @@ macro_rules! construct_runtime {
 		mashup! {
 			$(
 				substrate_generate_ident_name["config-ident" $name] = $name Config;
-				substrate_generate_ident_name["inherent-error-ident" $name] = $name InherentError;
 			)*
 		}
 
@@ -337,6 +345,7 @@ macro_rules! construct_runtime {
 		__decl_outer_inherent!(
 			$runtime;
 			$block;
+			$inherent;
 			;
 			$(
 				$name: $module::{ $( $modules $( <$modules_generic> )* ),* }
@@ -1062,6 +1071,7 @@ macro_rules! __decl_outer_inherent {
 	(
 		$runtime:ident;
 		$block:ident;
+		$inherent:ty;
 		$( $parsed_modules:ident :: $parsed_name:ident ),*;
 		$name:ident: $module:ident::{
 			Inherent $(, $modules:ident $( <$modules_generic:ident> )* )*
@@ -1073,6 +1083,7 @@ macro_rules! __decl_outer_inherent {
 		__decl_outer_inherent!(
 			$runtime;
 			$block;
+			$inherent;
 			$( $parsed_modules :: $parsed_name, )* $module::$name;
 			$(
 				$rest_name: $rest_module::{
@@ -1084,6 +1095,7 @@ macro_rules! __decl_outer_inherent {
 	(
 		$runtime:ident;
 		$block:ident;
+		$inherent:ty;
 		$( $parsed_modules:ident :: $parsed_name:ident ),*;
 		$name:ident: $module:ident::{
 			$ingore:ident $( <$ignor:ident> )* $(, $modules:ident $( <$modules_generic:ident> )* )*
@@ -1095,6 +1107,7 @@ macro_rules! __decl_outer_inherent {
 		__decl_outer_inherent!(
 			$runtime;
 			$block;
+			$inherent;
 			$( $parsed_modules :: $parsed_name ),*;
 			$name: $module::{ $( $modules $( <$modules_generic> )* ),* }
 			$(
@@ -1107,6 +1120,7 @@ macro_rules! __decl_outer_inherent {
 	(
 		$runtime:ident;
 		$block:ident;
+		$inherent:ty;
 		$( $parsed_modules:ident :: $parsed_name:ident ),*;
 		$name:ident: $module:ident::{}
 		$(, $rest_name:ident : $rest_module:ident::{
@@ -1116,6 +1130,7 @@ macro_rules! __decl_outer_inherent {
 		__decl_outer_inherent!(
 			$runtime;
 			$block;
+			$inherent;
 			$( $parsed_modules :: $parsed_name ),*;
 			$(
 				$rest_name: $rest_module::{
@@ -1127,17 +1142,16 @@ macro_rules! __decl_outer_inherent {
 	(
 		$runtime:ident;
 		$block:ident;
+		$inherent:ty;
 		$( $parsed_modules:ident :: $parsed_name:ident ),*;
 		;
 	) => {
-		substrate_generate_ident_name! {
-			impl_outer_inherent!(
-				pub struct InherentData where Block = $block {
-					$(
-						$parsed_modules: $parsed_name,
-					)*
-				}
-			);
-		}
+		impl_outer_inherent!(
+			for $runtime,
+			Block = $block,
+			InherentData = $inherent {
+				$($parsed_modules : $parsed_name,)*
+			}
+		);
 	};
 }