diff --git a/src/schedule-2.0/src/Controller/EventController.php b/src/schedule-2.0/src/Controller/EventController.php
index e944d91..f54d1c1 100755
--- a/src/schedule-2.0/src/Controller/EventController.php
+++ b/src/schedule-2.0/src/Controller/EventController.php
@@ -482,7 +482,7 @@ class EventController extends AbstractController
             "textColor" => "#ffffff",
             "allDay" => $event->getAllday(),
             "holiday" => $event->getTask()->getNature()->getIsvacation(),
-            "externaltrip" => $event->getExternalTrip(),
+            "externaltrip" => ($event instanceof Penalty?$event->getExternalTrip():false),
             "editable" => $editable,
             "durationEditable" => false,
             "extendedProps" => [