diff --git a/chat-signaling-server/templates/index.html b/chat-signaling-server/templates/index.html
index 5c1a530..49dc15d 100644
--- a/chat-signaling-server/templates/index.html
+++ b/chat-signaling-server/templates/index.html
@@ -27,7 +27,7 @@
         const MessageSessionAnswer = "SessionAnswer";
         const MessageICECandidate = "IceCandidate";
 
-        function ChatRoom(room, name, ui, options) {
+        function ChatRoom(room, name, options) {
             options = options || {};
             let { iceServers } = options;
 
@@ -42,8 +42,6 @@
 
             this.ws = null;
 
-            this.ui = ui;
-
             this.event = new EventTarget();
         }
 
@@ -479,7 +477,7 @@
 
         let search = new URLSearchParams(location.search);
 
-        let room = new ChatRoom(search.get("room") || "public", search.get("name") || "", undefined, {})
+        let room = new ChatRoom(search.get("room") || "public", search.get("name") || "", {})
         let ui = new ChatUI(message_list, peers, inputbox, sendfile);
         ui.setup()