diff --git a/core/includes/form.inc b/core/includes/form.inc
index 35025aa19477da899f9b9a9f7b307437694824fe..513615cdd0a91cd9f7bd59073870be42dea2818c 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -4101,11 +4101,11 @@ function form_process_autocomplete($element, &$form_state) {
     $element['autocomplete'] = array(
       '#type' => 'hidden',
       '#input' => FALSE,
-      '#id' => $element['#id'] . '-autocomplete',
       '#value' => url($element['#autocomplete_path'], array('absolute' => TRUE)),
       '#disabled' => TRUE,
       '#attributes' => array(
         'class' => array('autocomplete'),
+        'id' => $element['#id'] . '-autocomplete',
       ),
     );
   }