diff --git a/polkadot/runtime/kusama/src/lib.rs b/polkadot/runtime/kusama/src/lib.rs
index 5a7dca5479..d09bf3fe61 100644
--- a/polkadot/runtime/kusama/src/lib.rs
+++ b/polkadot/runtime/kusama/src/lib.rs
@@ -144,13 +144,12 @@ pub fn native_version() -> NativeVersion {
 	}
 }
 
-/// Avoid processing transactions from slots and parachain registrar except by root.
+/// Don't allow swaps until parathread story is more mature.
 pub struct BaseFilter;
 impl Filter<Call> for BaseFilter {
 	fn filter(c: &Call) -> bool {
 		!matches!(c,
-			Call::Registrar(..) |
-			Call::Slots(..)
+			Call::Registrar(paras_registrar::Call::swap(..))
 		)
 	}
 }
diff --git a/polkadot/runtime/westend/src/lib.rs b/polkadot/runtime/westend/src/lib.rs
index 3f95fbb687..c06e59ebf2 100644
--- a/polkadot/runtime/westend/src/lib.rs
+++ b/polkadot/runtime/westend/src/lib.rs
@@ -143,14 +143,11 @@ pub fn native_version() -> NativeVersion {
 	}
 }
 
-/// Avoid processing transactions from slots and parachain registrar except by root.
+/// Allow everything.
 pub struct BaseFilter;
 impl Filter<Call> for BaseFilter {
-	fn filter(c: &Call) -> bool {
-		!matches!(c,
-			Call::Registrar(..) |
-			Call::Slots(..)
-		)
+	fn filter(_: &Call) -> bool {
+		true
 	}
 }