diff --git a/src/main.ts b/src/main.ts
index c476303..d20ed8c 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -3,7 +3,8 @@ import { Functions } from "./functions";
 import { createConsole, createConsoleGroup, getRoomsPanelWidth } from "./utils";
 
 function init() {
-  if (!getRoomsPanelWidth()) {
+  // #app > .vac-col-messages 是用于判断是否在「转发聊天页面」页面
+  if (!getRoomsPanelWidth() && !document.querySelector("#app > .vac-col-messages")) {
     setTimeout(init, 1000);
     createConsole("ADDON", "rooms-panel not found, try again after 1s");
     return;
diff --git a/src/utils.ts b/src/utils.ts
index e221f1e..9e3fd37 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -45,8 +45,8 @@ export function getRootStyle(key: any) {
 }
 
 export function getRoomsPanelWidth() {
-  return (document.getElementsByClassName("rooms-panel")[0] as HTMLElement)
-    .style.width;
+  return (document.getElementsByClassName("rooms-panel")[0] as HTMLElement || undefined)
+    ?.style.width;
 }
 
 export function createConsole(code: string, desc: string) {