diff -up net-tools-1.60/lib/ec_hw.c.old net-tools-1.60/lib/ec_hw.c
--- net-tools-1.60/lib/ec_hw.c.old	1999-11-20 22:02:53.000000000 +0100
+++ net-tools-1.60/lib/ec_hw.c	2008-02-25 09:04:00.000000000 +0100
@@ -18,6 +18,7 @@
 
 #include <net/if_arp.h>
 #include "net-support.h"
+#define NULL ((void *) 0)
 
 struct hwtype ec_hwtype =
 {