diff --git a/multiupload_filefield_widget.module b/multiupload_filefield_widget.module
index 13e8605..46cc86c 100644
--- a/multiupload_filefield_widget.module
+++ b/multiupload_filefield_widget.module
@@ -77,7 +77,7 @@ function mfw_managed_file_value(&$element, $input = FALSE, $form_state = NULL) {
   if ($input !== FALSE) {
     $return = $input;
 
-    $element_parent = drupal_array_get_nested_value($form_state['complete form'], array_slice($element['#parents'],0,-1));
+    $element_parent = drupal_array_get_nested_value($form_state['complete form'], array_slice($element['#array_parents'],0,-1));
     $element['#file_upload_delta_original'] = isset($element_parent['#file_upload_delta'])? $element_parent['#file_upload_delta'] : 0;
 
     // Uploads take priority over all other values.