$OpenBSD: patch-src_pf_c,v 1.3 2016/06/13 09:12:40 landry Exp $
--- src/pf.c.orig	Fri Jan 22 10:51:17 2016
+++ src/pf.c	Mon Jun  6 09:18:40 2016
@@ -36,6 +36,7 @@
 # include <netinet/in.h>
 #endif
 
+#include <netinet/in.h>
 #include <net/pfvar.h>
 
 #ifndef FCNT_NAMES
