diff --git a/addons/web_calendar/static/src/js/calendar.js b/addons/web_calendar/static/src/js/calendar.js
index 81e7712ff1f..9cac4db09d5 100644
--- a/addons/web_calendar/static/src/js/calendar.js
+++ b/addons/web_calendar/static/src/js/calendar.js
@@ -465,12 +465,12 @@ instance.web_calendar.CalendarView = instance.web.View.extend({
             });
         } else {
             var pop = new instance.web.form.FormOpenPopup(this);
-            var id_for_buggy_addons = this.dataset.ids[index]; // ids could be non numeric
-            pop.show_element(this.dataset.model, id_for_buggy_addons, this.dataset.get_context(), {
+            var id_from_dataset = this.dataset.ids[index]; // dhtmlx scheduler loses id's type
+            pop.show_element(this.dataset.model, id_from_dataset, this.dataset.get_context(), {
                 title: _t("Edit: ") + this.name
             });
             pop.on('write_completed', self, function(){
-                self.reload_event(event_id);
+                self.reload_event(id_from_dataset);
             });
         }
     },