diff --git a/module/task/control.php b/module/task/control.php
index 601c8bc479..7cbefe3cbd 100644
--- a/module/task/control.php
+++ b/module/task/control.php
@@ -1280,6 +1280,10 @@ class task extends control
         }
         else
         {
+            /* Delete related issue in gitlab. */
+            $relation = $this->loadModel('gitlab')->getGitlabIssueFromRelation('task', $taskID);
+            $this->loadModel('gitlab')->deleteIssue($relation->gitlabID, $relation->projectID, 'task', $taskID);
+            
             $this->task->delete(TABLE_TASK, $taskID);
             if($task->parent > 0)
             {