diff --git a/web/alert/index.js b/web/alert/index.js
index 9a68d65..48ecc49 100644
--- a/web/alert/index.js
+++ b/web/alert/index.js
@@ -97,7 +97,7 @@ $(async function () {
     class Announcement {
         constructor(data){
             this.user = data.user;
-            this.tpe = data.tpe;
+            this.tpe = data.tpe || 'start';
             this.details = data.details || {};
         }
     }