$OpenBSD: patch-src_bpf_c,v 1.3 2012/06/25 14:06:26 naddy Exp $
--- src/bpf.c.orig	Mon Jun 25 07:44:01 2012
+++ src/bpf.c	Mon Jun 25 07:45:08 2012
@@ -20,6 +20,7 @@
 #include <ifaddrs.h>
 
 #if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
+#include <sys/param.h>
 #include <sys/sysctl.h>
 #include <net/route.h>
 #include <net/if_dl.h>
