diff --git a/scripts/test-iperf b/scripts/test-iperf
index c753088..af3b375 100755
--- a/scripts/test-iperf
+++ b/scripts/test-iperf
@@ -17,6 +17,10 @@ if [[ -z $MY_PORT ]] ; then
 	exit 27
 fi
 
+if [[ $MY_PORT -lt 10 ]] ; then
+	MY_PORT="0$MY_PORT"
+fi
+
 for VLAN in {10..4000} ; do
 	if [[ -f /etc/netdev/vlan.$VLAN.csv ]] ; then
 		VLAN_CONF=`grep $SERVER_SERIAL \