diff --git a/openmptcprouter/files/bin/omr-iperf b/openmptcprouter/files/bin/omr-iperf
index 090bd5a86..aec04c761 100755
--- a/openmptcprouter/files/bin/omr-iperf
+++ b/openmptcprouter/files/bin/omr-iperf
@@ -1,5 +1,6 @@
 #!/bin/sh
 SERVER=$1
+[ -z "$SERVER" ] && SERVER="vps"
 KEY=$(uci -q get iperf.$SERVER.key)
 USER=$(uci -q get iperf.$SERVER.user)
 PASSWORD=$(uci -q get iperf.$SERVER.password)