diff --git a/core/modules/system/system.js b/core/modules/system/system.js
index 5c808d3..99f0633 100644
--- a/core/modules/system/system.js
+++ b/core/modules/system/system.js
@@ -1,4 +1,4 @@
-(function ($) {
+(function ($, Drupal, drupalSettings) {
 
 "use strict";
 
@@ -11,11 +11,11 @@ var ids = [];
  * administrator e-mail address with the same value as the site e-mail address.
  */
 Drupal.behaviors.copyFieldValue = {
-  attach: function (context, settings) {
+  attach: function (context) {
     // List of fields IDs on which to bind the event listener.
     // Create an array of IDs to use with jQuery.
-    for (var sourceId in settings.copyFieldValue) {
-      if (settings.copyFieldValue.hasOwnProperty(sourceId)) {
+    for (var sourceId in drupalSettings.copyFieldValue) {
+      if (drupalSettings.copyFieldValue.hasOwnProperty(sourceId)) {
         ids.push(sourceId);
       }
     }
@@ -55,9 +55,9 @@ Drupal.behaviors.copyFieldValue = {
    */
   valueSourceBlurHandler: function (e) {
     var value = $(e.target).val();
-    var targetIds = Drupal.settings.copyFieldValue[e.target.id];
+    var targetIds = drupalSettings.copyFieldValue[e.target.id];
     $('#' + targetIds.join(', #')).trigger('value:copy', value);
   }
 };
 
-})(jQuery);
+})(jQuery, Drupal, drupalSettings);
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 4475104..c24fbdc 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -1965,6 +1965,7 @@ function system_library_info() {
       array('system', 'jquery'),
       array('system', 'drupal'),
       array('system', 'drupalSettings'),
+      array('system', 'jquery.once'),
     ),
   );
   $libraries['drupal.system.cron'] = array(