diff --git a/src/include/config-aux.h b/src/include/config-aux.h
index 45a5f3b..2dcbc27 100644
--- a/src/include/config-aux.h
+++ b/src/include/config-aux.h
@@ -51,3 +51,8 @@ typedef bool _Bool;
 #define PV_REMOTE_CONTROL 1
 # endif
 #endif
+
+/* Remove __attribute__(()) if not using GCC. */
+#ifndef __GNUC__
+#define __attribute__(x) /* GCC-only feature */
+#endif