diff --git a/usr/local/www/firewall_virtual_ip_edit.php b/usr/local/www/firewall_virtual_ip_edit.php
index 1f6e8878a6..e0cdcbd5a5 100755
--- a/usr/local/www/firewall_virtual_ip_edit.php
+++ b/usr/local/www/firewall_virtual_ip_edit.php
@@ -143,8 +143,8 @@ if ($_POST) {
 		if (isset($id) && $a_vip[$id]) {
 			/* modify all virtual IP rules with this address */
 			for ($i = 0; isset($config['nat']['rule'][$i]); $i++) {
-				if ($config['nat']['rule'][$i]['external-address'] == $a_vip[$id]['ipaddr'])
-					$config['nat']['rule'][$i]['external-address'] = $vipent['ipaddr'];
+				if ($config['nat']['rule'][$i]['external-address'] == $a_vip[$id]['subnet'])
+					$config['nat']['rule'][$i]['external-address'] = $vipent['subnet'];
 			}
 			$a_vip[$id] = $vipent;
 		} else
@@ -388,4 +388,4 @@ typesel_change();
 </script>
 <?php include("fend.inc"); ?>
 </body>
-</html>
\ No newline at end of file
+</html>