diff --git a/examples/udhcp/simple.script b/examples/udhcp/simple.script
index d42f2d3d5..0397e506c 100755
--- a/examples/udhcp/simple.script
+++ b/examples/udhcp/simple.script
@@ -29,7 +29,8 @@ case "$1" in
 			metric=0
 			for i in $router ; do
 				echo "Adding router $i"
-				route add default gw $i dev $interface metric $((metric++))
+				route add default gw $i dev $interface metric $metric
+				: $(( metric += 1 ))
 			done
 		fi