diff --git a/src/lib.rs b/src/lib.rs
index 135a0bc..79bca17 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -102,10 +102,7 @@
     clippy::wrong_self_convention,
 )]
 
-#[cfg(all(
-    not(all(target_arch = "wasm32", target_os = "unknown")),
-    feature = "proc-macro"
-))]
+#[cfg(feature = "proc-macro")]
 extern crate proc_macro;
 
 mod ext;