diff --git a/usr/local/www/firewall_virtual_ip_edit.php b/usr/local/www/firewall_virtual_ip_edit.php
index 6cd6cb8f66..2b24badb6e 100755
--- a/usr/local/www/firewall_virtual_ip_edit.php
+++ b/usr/local/www/firewall_virtual_ip_edit.php
@@ -297,15 +297,6 @@ function enable_change() {
 		case "proxyarp": set_note(proxyarpnote);	break;
 		default: set_note(undefined);
 	}
-	interface_change();
-}
-
-function interface_change() {
-	if (get_radio_value(document.iform.mode) == "carp") {
-		var ifname = document.iform.interface.options[document.iform.interface.selectedIndex].value + "_subnet";
-		document.iform.subnet_bits.value = document.getElementById(ifname).value;
-	}
-
 	typesel_change();
 }
 
@@ -368,7 +359,7 @@ function typesel_change() {
 				<tr>
 				  <td width="22%" valign="top" class="vncellreq"><?=gettext("Interface");?></td>
 				  <td width="78%" class="vtable">
-					<select name="interface" class="formselect" onclick="interface_change()">
+					<select name="interface" class="formselect">
 					<?php 
 					  $interfaces = get_configured_interface_with_descr(false, true);
 					  $carplist = get_configured_carp_interface_list();
@@ -382,10 +373,6 @@ function typesel_change() {
 					</select>
 				  </td>
                 </tr>
-		<?php
-			foreach ($interfaces as $iface => $ifacename)
-				print '<input id="' . $iface . '_subnet" type="hidden" value="' . get_interface_subnet($iface) . '">' . "\n";
-		?>
                 <tr>
                   <td valign="top" class="vncellreq"><?=gettext("IP Address(es)");?></td>
                   <td class="vtable">