diff --git a/addons/website_event/static/src/snippets/options.js b/addons/website_event/static/src/snippets/options.js
index c1f796b0e3a..eb2fd86189d 100644
--- a/addons/website_event/static/src/snippets/options.js
+++ b/addons/website_event/static/src/snippets/options.js
@@ -62,7 +62,7 @@ options.registry.WebsiteEvent = options.Class.extend({
      * @private
      */
     _getEventObjectId() {
-        const objectIds = this.currentWebsiteUrl.match(/(?<=-)\d+(?![-\w\d])/);
-        return parseInt(objectIds[0]) | 0;
+        const objectIds = this.currentWebsiteUrl.match(/-\d+(?![-\w\d])/);
+        return parseInt(objectIds[0].replace('-', '')) | 0;
     },
 });