diff --git a/library/think/App.php b/library/think/App.php
index 70296a3d..1d272ac3 100644
--- a/library/think/App.php
+++ b/library/think/App.php
@@ -78,10 +78,6 @@ class App
     {
         is_null($request) && $request = Request::instance();
 
-        if ('ico' == $request->ext()) {
-            throw new HttpException(404, 'ico file not exists');
-        }
-
         $config = self::initCommon();
         $request->filter($config['default_filter']);
         try {