--- lib/zebra.h.orig	2009-12-09 23:37:12.000000000 +1100
+++ lib/zebra.h	2012-07-05 00:54:00.000000000 +1000
@@ -143,6 +143,7 @@ typedef int socklen_t;
 #endif /* HAVE_SYS_SOCKIO_H */
 
 #ifdef HAVE_NETINET_IN_H
+#define __APPLE_USE_RFC_3542
 #include <netinet/in.h>
 #endif /* HAVE_NETINET_IN_H */
 #include <netinet/in_systm.h>