diff --git a/addons/web_calendar/static/src/js/calendar.js b/addons/web_calendar/static/src/js/calendar.js
index 9d6ce68a553..b696d4a2c5d 100644
--- a/addons/web_calendar/static/src/js/calendar.js
+++ b/addons/web_calendar/static/src/js/calendar.js
@@ -404,7 +404,7 @@ instance.web_calendar.CalendarView = instance.web.View.extend({
             '&', [this.date_stop, '>=', A], [this.date_stop, '<=', B],
             '&', [this.date_start, '<', A], [this.date_stop, '>', B]
         ];
-        domain.concat(this.last_search[0].slice(0))
+        domain = domain.concat(this.last_search[0].slice(0))
         return domain;
     },
     do_show: function () {