@@ -35,11 +35,11 @@
  */
 @interface OFString: OFObject <OFCopying, OFMutableCopying>
 {
 	char	     *string;
 	unsigned int length;
-#if !defined(__objc_INCLUDE_GNU) && __LP64__
+#if defined(OF_APPLE_RUNTIME) && __LP64__
 	int	     _unused;
 #endif
 	BOOL	     is_utf8;
 }