diff --git a/openmptcprouter/files/etc/init.d/openmptcprouter-vps b/openmptcprouter/files/etc/init.d/openmptcprouter-vps
index 867104fd7..f64b78c56 100755
--- a/openmptcprouter/files/etc/init.d/openmptcprouter-vps
+++ b/openmptcprouter/files/etc/init.d/openmptcprouter-vps
@@ -1161,7 +1161,7 @@ _set_vps_firewall() {
 	fw_list=$(_set_json "shorewalllist" "$settings")
 	[ -z "$fw_list" ] && return
 	if [ -n "$vpsfwlist" ]; then
-		vpsfwlist="$vpsfwlist\n$(echo $fw_list | jsonfilter -q -e '@.list[*]' | sed '/^[[:space:]]*$/d')"
+		vpsfwlist="${vpsfwlist}"$'\n'"$(echo $fw_list | jsonfilter -q -e '@.list[*]' | sed '/^[[:space:]]*$/d')"
 	else
 		vpsfwlist="$(echo $fw_list | jsonfilter -q -e '@.list[*]' | sed '/^[[:space:]]*$/d')"
 	fi