diff --git a/web_advanced_search/static/src/js/web_advanced_search_x2x.js b/web_advanced_search/static/src/js/web_advanced_search_x2x.js
index 4f36b9e2..06cc0eea 100644
--- a/web_advanced_search/static/src/js/web_advanced_search_x2x.js
+++ b/web_advanced_search/static/src/js/web_advanced_search_x2x.js
@@ -38,9 +38,11 @@ odoo.define('web_advanced_search_x2x.search_filters', function (require) {
                 'value': 'domain', 'text': core._lt('is in selection'),
             });
             // Avoid hiding filter when using special widgets
-            this.events["click"] = function (event) {
-                event.stopPropagation();
-            }
+            this.events = $.extend({}, this.events, {
+                click: function (event) {
+                    event.stopPropagation();
+                },
+            });
             return this._super.apply(this, arguments);
         },