diff --git a/include/class.queue.php b/include/class.queue.php
index 3754c1b87ef89812f810400b8abce4e694c3485f..c51aa79a69d51246969a4fde16716e9177e494ac 100644
--- a/include/class.queue.php
+++ b/include/class.queue.php
@@ -2099,6 +2099,8 @@ extends VerySimpleModel {
                 list($path, $field) = $key;
                 $fields[] = new SqlField($path);
             }
+            // Force nulls to the buttom.
+            $fields[] = 'zzz';
 
             $alias = sprintf('C%d', $this->getId());
             $expr = call_user_func_array(array('SqlFunction', 'COALESCE'),