diff --git a/substrate/wasm-runtime/polkadot/src/runtime/mod.rs b/substrate/wasm-runtime/polkadot/src/runtime/mod.rs
index 6af33d6a657335df4401cf407c3adf96ce26e704..9befa9bd42df8d10a6fa02b081eb6c4a1bf3de04 100644
--- a/substrate/wasm-runtime/polkadot/src/runtime/mod.rs
+++ b/substrate/wasm-runtime/polkadot/src/runtime/mod.rs
@@ -30,3 +30,4 @@ pub mod session;
 pub mod governance;
 
 // TODO: polkadao
+// TODO: parachains