diff --git a/src/www/javascript/opnsense_legacy.js b/src/www/javascript/opnsense_legacy.js
index 1e3a08550..162a99999 100644
--- a/src/www/javascript/opnsense_legacy.js
+++ b/src/www/javascript/opnsense_legacy.js
@@ -48,16 +48,16 @@ function notice_action(action,msgid) {
  * @param data_id: data field reference to network input field
  */
 function hook_ipv4v6(classname, data_id) {
-  $("."+classname).each(function(){
+  $("select."+classname).each(function(){
       var selectlist_id = $(this).attr('id');
       if ($(this).data(data_id) != undefined) {
         $("#"+$(this).data(data_id)).change(function(){
           var itemValue = $(this).val();
           $("#"+selectlist_id+" > option").each(function() {
               if (parseInt($(this).val()) > 32 && itemValue.indexOf(":") == -1 ) {
-                  $(this).addClass('hidden');
+                  $(this).hide()
               } else {
-                  $(this).removeClass('hidden');
+                  $(this).show();
               }
           });
           // select highest visible option