--- drivers.c.orig	Mon Apr  4 19:46:02 2016
+++ drivers.c	Mon Apr  4 19:46:11 2016
@@ -60,6 +60,7 @@ char *strchr (), *strrchr ();
 #include <net/soioctl.h>
 #endif
 #ifdef HAVE_SYS_MBUF_H
+#include <sys/queue.h>
 #include <sys/mbuf.h>
 #endif
 #ifdef HAVE_NET_ROUTE_H