-#ifdef SILC_HAVE_PTHREAD
-/* For pthreads rwlock support */
-#ifndef _XOPEN_SOURCE
-#define _XOPEN_SOURCE 500
-#else
-#ifdef _XOPEN_SOURCE < 500
-#define _XOPEN_SOURCE_SAVE _XOPEN_SOURCE
-#undef _XOPEN_SOURCE
-#define _XOPEN_SOURCE 500
-#endif /* _XOPEN_SOURCE < 500 */
-#endif /* _XOPEN_SOURCE */
-#endif /* SILC_HAVE_PTHREAD */
-