$NetBSD: patch-af,v 1.1 2006/02/24 20:08:32 joerg Exp $

--- trace.c.orig	2006-02-24 19:59:46.000000000 +0000
+++ trace.c
@@ -74,7 +74,7 @@
 #include <sys/uio.h>
 #include <sys/queue.h>
 #include <net/if.h>
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
+#if defined(__DragonFly__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3)
 #include <net/if_var.h>
 #endif
 #include <net/route.h>