diff --git a/modules/default/calendar/calendarfetcher.js b/modules/default/calendar/calendarfetcher.js
index 867b89e2..964cb955 100644
--- a/modules/default/calendar/calendarfetcher.js
+++ b/modules/default/calendar/calendarfetcher.js
@@ -240,7 +240,6 @@ const CalendarFetcher = function (url, reloadInterval, excludedEvents, maximumEn
 							const dateKey = date.toISOString().substring(0, 10);
 							let curEvent = event;
 							let showRecurrence = true;
-							let duration = 0;
 
 							startDate = moment(date);