$OpenBSD: patch-tun_h,v 1.1 2005/05/22 05:39:26 mjc Exp $
--- tun.h.orig	Sat May 21 21:35:11 2005
+++ tun.h	Sat May 21 21:35:34 2005
@@ -9,7 +9,9 @@
 #ifndef TUN_H
 #define TUN_H
 
+#ifndef DNET_TUN_H
 typedef struct tun tun_t;
+#endif
 
 typedef void (*tun_handler)(void *buf, size_t len, void *arg);