diff --git a/resources/assets/javascripts/bootstrap/fullcalendar.js b/resources/assets/javascripts/bootstrap/fullcalendar.js
index a3d0c483e38d68178c3b904989a84f717e7b6672..62beaa9e9f2d7fde29ab018ebc63d9fcb138a876 100644
--- a/resources/assets/javascripts/bootstrap/fullcalendar.js
+++ b/resources/assets/javascripts/bootstrap/fullcalendar.js
@@ -19,7 +19,7 @@ STUDIP.ready(function () {
         setTimeout(() => {
             calendar.updateSize();
             if (ttl > 0) {
-                continuousRefresh(ttl - 1);
+                continuousRefresh(calendar, ttl - 1);
             }
         }, 200);
     }