diff --git a/openmptcprouter/files/etc/uci-defaults/1920-omr-network b/openmptcprouter/files/etc/uci-defaults/1920-omr-network
index e897371d0..6572e6158 100755
--- a/openmptcprouter/files/etc/uci-defaults/1920-omr-network
+++ b/openmptcprouter/files/etc/uci-defaults/1920-omr-network
@@ -346,6 +346,10 @@ if [ "$(uci -q show network.wan1 | grep multipath)" = "" ] && [ -z "$(uci -q get
 		_setup_wan_interface wan4 lan4 on
 		_macaddr=$(uci -q get "network.lan4.macaddr")
 		_setup_macaddr "wan4" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
+		if [ -d /sys/class/net/lan5 -o -n "$(ip link | grep ' lan5')" ]; then
+			_macaddr=$(uci -q get "network.lan5.macaddr")
+			_setup_macaddr "wan5" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
+		fi
 	elif [ -d /sys/class/net/wan1 ] || [ -n "$(ip link | grep ' wan1')" ]; then
 		if [ -d /sys/class/net/wan2 ] || [ -n "$(ip link | grep ' wan2')" ]; then
 			_setup_wan_interface wan1 wan1 master