diff --git a/ip/routef b/ip/routef
index db43b5df..d266e2d9 100644
--- a/ip/routef
+++ b/ip/routef
@@ -1,3 +1,9 @@
 #! /bin/sh
 
-exec ip -4 ro flush  scope global  type unicast
+if [ -z "$*" ] ; then
+	exec ip -4 ro flush  scope global  type unicast
+else
+	echo "Usage: routef"
+	echo
+	echo "This script will flush the IPv4 routing table"
+fi