diff --git a/parachain/src/wasm_executor/mod.rs b/parachain/src/wasm_executor/mod.rs
index e98f9177050e..326d286d238c 100644
--- a/parachain/src/wasm_executor/mod.rs
+++ b/parachain/src/wasm_executor/mod.rs
@@ -259,4 +259,16 @@ impl sp_externalities::ExtensionStore for ValidationExternalities {
 			None
 		}
 	}
+
+	fn register_extension_with_type_id(
+		&mut self,
+		type_id: TypeId,
+		extension: Box<dyn sp_externalities::Extension>,
+	) -> Result<(), sp_externalities::Error> {
+		panic!("register_extension_with_type_id: unsupported feature for parachain validation")
+	}
+
+	fn deregister_extension_by_type_id(&mut self, type_id: TypeId) {
+		panic!("deregister_extension_by_type_id: unsupported feature for parachain validation")
+	}
 }