diff --git a/openmptcprouter/files/etc/uci-defaults/1980-omr-firewall b/openmptcprouter/files/etc/uci-defaults/1980-omr-firewall
index 709eaaf05..3719a41b0 100755
--- a/openmptcprouter/files/etc/uci-defaults/1980-omr-firewall
+++ b/openmptcprouter/files/etc/uci-defaults/1980-omr-firewall
@@ -226,12 +226,12 @@ fi
 allintf=$(uci -q get firewall.zone_wan.network)
 uci -q del firewall.zone_wan.network
 for intf in $allintf; do
-	uci -q add_list firewall.zone_wan.network=$intf
+	uci -q add_list firewall.zone_wan.network="${intf}"
 done
 allintf=$(uci -q get firewall.zone_vpn.network)
 uci -q del firewall.zone_vpn.network
 for intf in $allintf; do
-	uci -q add_list firewall.zone_vpn.network=$intf
+	uci -q add_list firewall.zone_vpn.network="${intf}"
 done
 
 uci -q batch <<-EOF >/dev/null