diff --git a/include/class.queue.php b/include/class.queue.php
index 6b4c1adc1cab13613ffd170f80a6d568e4cf5518..24b9d33e07d5368d72eb5ebe23a05794055a5617 100644
--- a/include/class.queue.php
+++ b/include/class.queue.php
@@ -253,6 +253,7 @@ class CustomQueue extends VerySimpleModel {
                 'topic_id',
                 'created',
                 'est_duedate',
+                'duedate',
             )
         );