diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 13db689..4b14924 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1871,7 +1871,7 @@ function drupal_pre_render_table(array $element) {
     foreach ($element['#tabledrag'] as &$args) {
       array_unshift($args, $element['#attributes']['id']);
     }
-    drupal_attach_tabledrag($element, $element['#tabledrag']);
+    drupal_attach_tabledrag($element, $element['#tabledrag'][0]);
   }
 
   return $element;