$OpenBSD: patch-src_network_h,v 1.1 2014/03/22 23:05:43 sthen Exp $
--- src/network.h.orig	Sun Mar 16 01:45:27 2014
+++ src/network.h	Sun Mar 16 01:45:44 2014
@@ -230,7 +230,7 @@ struct my_icmphdr
     u_int32_t   gateway;        /* gateway address */
     struct
     {
-      u_int16_t __unused;
+      u_int16_t __dummy;
       u_int16_t mtu;
     } frag;                     /* path mtu discovery */
   } un;
