diff --git a/rust-bindings/rust/src/tests/kernel_args.rs b/rust-bindings/rust/src/tests/kernel_args.rs
index a24a3cb8..c8f9e625 100644
--- a/rust-bindings/rust/src/tests/kernel_args.rs
+++ b/rust-bindings/rust/src/tests/kernel_args.rs
@@ -1,4 +1,5 @@
-#[cfg(feature = "v2019_3")]
+#![cfg(feature = "v2019_3")]
+
 use crate::KernelArgs;
 
 #[test]