diff --git a/openmptcprouter/files/etc/uci-defaults/2020-omr-vpn b/openmptcprouter/files/etc/uci-defaults/2020-omr-vpn
index b571574d9..23e00009c 100755
--- a/openmptcprouter/files/etc/uci-defaults/2020-omr-vpn
+++ b/openmptcprouter/files/etc/uci-defaults/2020-omr-vpn
@@ -145,11 +145,11 @@ if [ "$(uci -q get glorytun-udp.vpn.key)" = "" ] && [ "$(uci -q get glorytun.vpn
 	uci -q commit glorytun-udp
 fi
 
-if [ "$(uci -q get network.tun0.metric)" = "1200" ] || [ -z "$(uci -q get network.tun0.metric)" ]; then
+if [ "$(uci -q get network.tun0.mtu)" = "1200" ] || [ -z "$(uci -q get network.tun0.mtu)" ]; then
 	uci -q batch <<-EOF >/dev/null
 		set network.tun0=device
 		set network.tun0.name='tun0'
-		set network.tun0.metric=9000
+		set network.tun0.mtu=9000
 		commit network
 	EOF
 fi