diff --git a/src/include/switch.h b/src/include/switch.h
index 035c1a175e..611d4bd669 100644
--- a/src/include/switch.h
+++ b/src/include/switch.h
@@ -51,7 +51,9 @@
 #define FREESWITCH_OID_PREFIX ".1.3.6.1.4.1." FREESWITCH_PEN
 #define FREESWITCH_ITAD "543"
 #define __EXTENSIONS__ 1
+#ifndef MACOSX
 #define _XOPEN_SOURCE 600
+#endif
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdarg.h>