diff --git a/polkadot/runtime/common/src/paras_registrar.rs b/polkadot/runtime/common/src/paras_registrar.rs
index 6a922818fe..451e804beb 100644
--- a/polkadot/runtime/common/src/paras_registrar.rs
+++ b/polkadot/runtime/common/src/paras_registrar.rs
@@ -645,7 +645,6 @@ mod tests {
 	parameter_types! {
 		pub const ParaDeposit: Balance = 10;
 		pub const DataDepositPerByte: Balance = 1;
-		pub const QueueSize: usize = 2;
 		pub const MaxRetries: u32 = 3;
 	}
 
diff --git a/polkadot/runtime/polkadot/src/lib.rs b/polkadot/runtime/polkadot/src/lib.rs
index ed62da9c54..69d30bb05d 100644
--- a/polkadot/runtime/polkadot/src/lib.rs
+++ b/polkadot/runtime/polkadot/src/lib.rs
@@ -833,7 +833,6 @@ where
 
 parameter_types! {
 	pub const ParathreadDeposit: Balance = 500 * DOLLARS;
-	pub const QueueSize: usize = 2;
 	pub const MaxRetries: u32 = 3;
 }
 
diff --git a/polkadot/runtime/rococo/src/lib.rs b/polkadot/runtime/rococo/src/lib.rs
index b45ef05777..10556b1f1b 100644
--- a/polkadot/runtime/rococo/src/lib.rs
+++ b/polkadot/runtime/rococo/src/lib.rs
@@ -419,7 +419,6 @@ where
 }
 
 parameter_types! {
-	pub const QueueSize: usize = 2;
 	pub const MaxRetries: u32 = 3;
 }