diff --git a/crates/pallets/starknet/runtime_api/src/lib.rs b/crates/pallets/starknet/runtime_api/src/lib.rs
index 81137fad02..38de0e529e 100644
--- a/crates/pallets/starknet/runtime_api/src/lib.rs
+++ b/crates/pallets/starknet/runtime_api/src/lib.rs
@@ -1,5 +1,6 @@
 //! Definition of the runtime API for the StarkNet pallet.
 
+// #![cfg_attr(not(feature = "std"), no_std)]
 // Adding allow unused type parameters to avoid clippy errors
 // generated by the `decl_runtime_apis` macro.
 // Specifically, the macro generates a trait (`StarknetRuntimeApi`) with unused type parameters.