diff --git a/substrate/client/network/src/behaviour.rs b/substrate/client/network/src/behaviour.rs
index e7aca1975c..37bc9bfb01 100644
--- a/substrate/client/network/src/behaviour.rs
+++ b/substrate/client/network/src/behaviour.rs
@@ -15,7 +15,7 @@
 // along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::{
-	debug_info, discovery::DiscoveryBehaviour, discovery::DiscoveryOut, DiscoveryNetBehaviour,
+	debug_info, discovery::DiscoveryBehaviour, discovery::DiscoveryOut,
 	Event, protocol::event::DhtEvent, ExHashT,
 };
 use crate::protocol::{self, light_client_handler, CustomMessageOutcome, Protocol};
diff --git a/substrate/client/network/src/lib.rs b/substrate/client/network/src/lib.rs
index 23233ee904..bb58f8c7bf 100644
--- a/substrate/client/network/src/lib.rs
+++ b/substrate/client/network/src/lib.rs
@@ -255,14 +255,3 @@ pub use libp2p::{Multiaddr, PeerId};
 pub use libp2p::multiaddr;
 
 pub use sc_peerset::ReputationChange;
-
-/// Extension trait for `NetworkBehaviour` that also accepts discovering nodes.
-trait DiscoveryNetBehaviour {
-	/// Notify the protocol that we have learned about the existence of nodes.
-	///
-	/// Can (or most likely will) be called multiple times with the same `PeerId`s.
-	///
-	/// Also note that there is no notification for expired nodes. The implementer must add a TTL
-	/// system, or remove nodes that will fail to reach.
-	fn add_discovered_nodes(&mut self, nodes: impl Iterator<Item = PeerId>);
-}
diff --git a/substrate/client/network/src/protocol.rs b/substrate/client/network/src/protocol.rs
index 55bc40a950..d534bde810 100644
--- a/substrate/client/network/src/protocol.rs
+++ b/substrate/client/network/src/protocol.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/>.
 
-use crate::{DiscoveryNetBehaviour, config::ProtocolId};
+use crate::config::ProtocolId;
 use crate::utils::interval;
 use bytes::{Bytes, BytesMut};
 use futures::prelude::*;
@@ -1582,6 +1582,13 @@ impl<B: BlockT, H: ExHashT> Protocol<B, H> {
 		self.sync.request_finality_proof(&hash, number)
 	}
 
+	/// Notify the protocol that we have learned about the existence of nodes.
+	///
+	/// Can be called multiple times with the same `PeerId`s.
+	pub fn add_discovered_nodes(&mut self, peer_ids: impl Iterator<Item = PeerId>) {
+		self.behaviour.add_discovered_nodes(peer_ids)
+	}
+
 	pub fn finality_proof_import_result(
 		&mut self,
 		request_block: (B::Hash, NumberFor<B>),
@@ -2205,12 +2212,6 @@ impl<B: BlockT, H: ExHashT> NetworkBehaviour for Protocol<B, H> {
 	}
 }
 
-impl<B: BlockT, H: ExHashT> DiscoveryNetBehaviour for Protocol<B, H> {
-	fn add_discovered_nodes(&mut self, peer_ids: impl Iterator<Item = PeerId>) {
-		self.behaviour.add_discovered_nodes(peer_ids)
-	}
-}
-
 impl<B: BlockT, H: ExHashT> Drop for Protocol<B, H> {
 	fn drop(&mut self) {
 		debug!(target: "sync", "Network stats:\n{}", self.format_stats());
diff --git a/substrate/client/network/src/protocol/generic_proto/behaviour.rs b/substrate/client/network/src/protocol/generic_proto/behaviour.rs
index 63625f1c9f..e52ac5575f 100644
--- a/substrate/client/network/src/protocol/generic_proto/behaviour.rs
+++ b/substrate/client/network/src/protocol/generic_proto/behaviour.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/>.
 
-use crate::{DiscoveryNetBehaviour, config::ProtocolId};
+use crate::config::ProtocolId;
 use crate::protocol::generic_proto::handler::{NotifsHandlerProto, NotifsHandlerOut, NotifsHandlerIn};
 use crate::protocol::generic_proto::upgrade::RegisteredProtocol;
 
@@ -405,6 +405,16 @@ impl GenericProto {
 		}
 	}
 
+	/// Notify the behaviour that we have learned about the existence of nodes.
+	///
+	/// Can be called multiple times with the same `PeerId`s.
+	pub fn add_discovered_nodes(&mut self, peer_ids: impl Iterator<Item = PeerId>) {
+		self.peerset.discovered(peer_ids.into_iter().map(|peer_id| {
+			debug!(target: "sub-libp2p", "PSM <= Discovered({:?})", peer_id);
+			peer_id
+		}));
+	}
+
 	/// Sends a notification to a peer.
 	///
 	/// Has no effect if the custom protocol is not open with the given peer.
@@ -708,15 +718,6 @@ impl GenericProto {
 	}
 }
 
-impl DiscoveryNetBehaviour for GenericProto {
-	fn add_discovered_nodes(&mut self, peer_ids: impl Iterator<Item = PeerId>) {
-		self.peerset.discovered(peer_ids.into_iter().map(|peer_id| {
-			debug!(target: "sub-libp2p", "PSM <= Discovered({:?})", peer_id);
-			peer_id
-		}));
-	}
-}
-
 impl NetworkBehaviour for GenericProto {
 	type ProtocolsHandler = NotifsHandlerProto;
 	type OutEvent = GenericProtoOut;