diff --git a/bbf/files/etc/firewall.userinterface b/bbf/files/etc/firewall.userinterface
index 16c3d04be..f9bb87c52 100755
--- a/bbf/files/etc/firewall.userinterface
+++ b/bbf/files/etc/firewall.userinterface
@@ -63,7 +63,7 @@ function delete_firewall_rule()
 	fi
 
 	zone="zone_${interface}_input"
-	CMD="iptables -w 1 -t filter -L ${zone} --line-numbers"
+	CMD="iptables -w 1 -t filter -nL ${zone} --line-numbers"
 	while ${CMD} 2>/dev/null | grep "${IDENTIFIER}"; do
 		rule_num="$(${CMD} | grep "${IDENTIFIER}" | head -1|awk '{print $1}')"
 		if [ -n "${rule_num}" ]; then
@@ -72,7 +72,7 @@ function delete_firewall_rule()
 	done
 
 	zone="zone_${interface}_output"
-	CMD="iptables -w 1 -t filter -L ${zone} --line-numbers"
+	CMD="iptables -w 1 -t filter -nL ${zone} --line-numbers"
 	while ${CMD} 2>/dev/null | grep "${IDENTIFIER}"; do
 		rule_num="$(${CMD} | grep "${IDENTIFIER}" | head -1|awk '{print $1}')"
 		if [ -n "${rule_num}" ]; then