diff --git a/substrate/paint/system/src/offchain.rs b/substrate/paint/system/src/offchain.rs
index 3d44746bfd..9f0a3ab1b2 100644
--- a/substrate/paint/system/src/offchain.rs
+++ b/substrate/paint/system/src/offchain.rs
@@ -59,7 +59,7 @@ impl<Public, Signature, AppPublic> Signer<Public, Signature> for AppPublic where
 /// Creates runtime-specific signed transaction.
 pub trait CreateTransaction<T: crate::Trait, Extrinsic: ExtrinsicT> {
 	/// A `Public` key representing a particular `AccountId`.
-	type Public;
+	type Public: IdentifyAccount<AccountId=T::AccountId> + Clone;
 	/// A `Signature` generated by the `Signer`.
 	type Signature;
 
@@ -85,10 +85,7 @@ type PublicOf<T, Call, X> = <
 >::Public;
 
 /// A trait to sign and submit transactions in offchain calls.
-pub trait SubmitSignedTransaction<T: crate::Trait, Call>
-where
-	PublicOf<T, Call, Self>: IdentifyAccount<AccountId=T::AccountId> + Clone,
-{
+pub trait SubmitSignedTransaction<T: crate::Trait, Call> {
 	/// Unchecked extrinsic type.
 	type Extrinsic: ExtrinsicT<Call=Call> + codec::Encode;
 
@@ -152,7 +149,6 @@ impl<T, E, S, C, Call> SubmitSignedTransaction<T, Call> for TransactionSubmitter
 	C: CreateTransaction<T, E>,
 	S: Signer<<C as CreateTransaction<T, E>>::Public, <C as CreateTransaction<T, E>>::Signature>,
 	E: ExtrinsicT<Call=Call> + codec::Encode,
-	<C as CreateTransaction<T, E>>::Public: IdentifyAccount<AccountId=T::AccountId> + Clone,
 {
 	type Extrinsic = E;
 	type CreateTransaction = C;