diff --git a/includes/views/nodequeue_handler_field_all_queues.inc b/includes/views/nodequeue_handler_field_all_queues.inc
index 090e879..456c2d0 100644
--- a/includes/views/nodequeue_handler_field_all_queues.inc
+++ b/includes/views/nodequeue_handler_field_all_queues.inc
@@ -54,7 +54,7 @@ class nodequeue_handler_field_all_queues extends views_handler_field_prerender_l
     );
   }
 
-  function pre_render($values) {
+  function pre_render(&$values) {
     $nids = array();
     foreach ($values as $result) {
       $nids[] = $result->{$this->field_alias};
diff --git a/includes/views/nodequeue_handler_field_all_subqueues.inc b/includes/views/nodequeue_handler_field_all_subqueues.inc
index 4b46f5d..952c5e1 100644
--- a/includes/views/nodequeue_handler_field_all_subqueues.inc
+++ b/includes/views/nodequeue_handler_field_all_subqueues.inc
@@ -7,7 +7,7 @@
  * @ingroup views_field_handlers
  */
 class nodequeue_handler_field_all_subqueues extends nodequeue_handler_field_all_queues {
-  function pre_render($values) {
+  function pre_render(&$values) {
     if (user_access('manipulate queues') || user_access('manipulate all queues')) {
       $nids = array();
       foreach ($values as $result) {