diff --git a/module/task/model.php b/module/task/model.php
index 5c8db735ca..f8dc536341 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -3287,7 +3287,7 @@ class taskModel extends model
                 echo substr($task->lastEditedDate, 5, 11);
                 break;
             case 'activatedDate':
-                echo helper::isZeroDate($bug->activatedDate) ? '' : substr($task->activatedDate, 5, 11);
+                echo helper::isZeroDate($task->activatedDate) ? '' : substr($task->activatedDate, 5, 11);
                 break;
             case 'actions':
                 if($storyChanged)