diff --git a/module/task/model.php b/module/task/model.php
index 71ee1d6fbb..33c3897043 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -402,6 +402,7 @@ class taskModel extends model
             ->setDefault('lastEditedBy', $this->app->user->account)
             ->setDefault('lastEditedDate', $now)
             ->remove('comment')
+            ->add('assignedDate', $now)
             ->get();
 
         $this->dao->update(TABLE_TASK)