diff --git a/firewall/firewall-add b/firewall/firewall-add
index 96105ed..4d563af 100755
--- a/firewall/firewall-add
+++ b/firewall/firewall-add
@@ -76,7 +76,7 @@ prerouting() {
 }
 
 postrouting() {
-	LINES=$($IPTABLES -L --line-number -n | grep $COMMENT | grep $TARGET_IP | grep MASQUERADE | awk '{print $1}'| tac)
+	LINES=$($IPTABLES -L --line-number -n | grep $COMMENT | grep $TARGET_IP | grep $TARGET_PORT | awk '{print $1}'| tac)
 	debug "Previous postrouting lines: "$LINES
 
 	# DELETE UNECESSARY LINES FROM PREVIOUS RULES