diff --git a/addons/web_calendar/static/src/js/calendar.js b/addons/web_calendar/static/src/js/calendar.js
index 2e12ddc50ad..a9287c0021c 100644
--- a/addons/web_calendar/static/src/js/calendar.js
+++ b/addons/web_calendar/static/src/js/calendar.js
@@ -515,7 +515,7 @@ instance.web_calendar.CalendarView = instance.web.View.extend({
         var self = this;
         var index = this.dataset.get_id_index(event_id);
         if (index !== null) {
-            this.dataset.unlink(event_id);
+            this.dataset.unlink(this.dataset.ids[index]);
         }
     },
 });