diff --git a/app/controllers/course/topics.php b/app/controllers/course/topics.php
index 96a238ab4a4a03f435b0d8e68f9bb56eaa2e4313..c8218569f3d07f4f46544bbb32714644e49b5e67 100644
--- a/app/controllers/course/topics.php
+++ b/app/controllers/course/topics.php
@@ -152,6 +152,8 @@ class Course_TopicsController extends AuthenticatedController
                 $topic->setId($topic->getNewId());
                 $topic->setNew(true);
                 $topic->store();
+
+                NotificationCenter::postNotification('TopicDidCopy', $topic_id, $topic->id);
             }
             PageLayout::postMessage(MessageBox::success(sprintf(_("%s Themen kopiert."), count(Request::getArray("topic")))));
             $this->redirect("course/topics");