$OpenBSD: patch-cfg_y,v 1.1 2012/04/22 21:44:24 sthen Exp $
--- cfg.y.orig	Sat Apr 21 16:48:37 2012
+++ cfg.y	Sat Apr 21 16:49:33 2012
@@ -111,6 +111,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <arpa/inet.h>
 #include <string.h>
