diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index c8fedb4..230a302 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -430,7 +430,7 @@ function locale_library_info_alter(&$libraries, $module) {
     // locale.datepicker.js should be added in the JS_LIBRARY group, so that
     // this attach behavior will execute early. JS_LIBRARY is the default for
     // hook_library_info_alter(), thus does not have to be specified explicitly.
-    $libraries['jquery.ui.datepicker']['dependencies']['js'][] = array('locale', 'locale.datepicker');
+    $libraries['jquery.ui.datepicker']['dependencies'][] = array('locale', 'locale.datepicker');
     $libraries['jquery.ui.datepicker']['js'][] = array(
       'data' => array(
         'jquery' => array(