diff --git a/polkadot/parachain/src/lib.rs b/polkadot/parachain/src/lib.rs
index 2cf441e88c..e73103d557 100644
--- a/polkadot/parachain/src/lib.rs
+++ b/polkadot/parachain/src/lib.rs
@@ -47,6 +47,7 @@
 
 pub mod primitives;
 
+#[cfg(all(not(feature = "std"), feature = "wasm-api"))]
 mod wasm_api;
 
 #[cfg(all(not(feature = "std"), feature = "wasm-api"))]