diff --git a/public/docs/ts/latest/guide/router.jade b/public/docs/ts/latest/guide/router.jade
index c43227213b..5e0c612d1d 100644
--- a/public/docs/ts/latest/guide/router.jade
+++ b/public/docs/ts/latest/guide/router.jade
@@ -1330,7 +1330,7 @@ h3#merge-hero-routes 把英雄区的路由合并到应用程序的路由中
 
   把`app.routes.ts`改成这样：
 
-+makeExample('router/ts/app/app.routes.2.ts', '', 'app/app.routes.ts (v.2)')(format=".")
++makeExample('router/ts/app/app.routes.3.ts', '', 'app/app.routes.ts (v.2)')(format=".")
 
 :marked
   We replace the `HeroListComponent` import with an `HeroesRoutes` import.