diff --git a/libc-top-half/musl/src/internal/pthread_impl.h b/libc-top-half/musl/src/internal/pthread_impl.h
index 1e7b9741..0106ac38 100644
--- a/libc-top-half/musl/src/internal/pthread_impl.h
+++ b/libc-top-half/musl/src/internal/pthread_impl.h
@@ -186,8 +186,10 @@ static inline void __wake(volatile void *addr, int cnt, int priv)
 	__syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS ||
 	__syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
 #else
+#ifdef _REENTRANT
 	__builtin_wasm_memory_atomic_notify((int*)addr, cnt);
 #endif
+#endif
 }
 static inline void __futexwait(volatile void *addr, int val, int priv)
 {