diff --git a/library/think/exception/RouteNotFoundException.php b/library/think/exception/RouteNotFoundException.php
index f85a3c4b..d22e3a63 100644
--- a/library/think/exception/RouteNotFoundException.php
+++ b/library/think/exception/RouteNotFoundException.php
@@ -16,7 +16,7 @@ class RouteNotFoundException extends HttpException
 
     public function __construct()
     {
-        parent::__construct(404);
+        parent::__construct(404, 'Route Not Found');
     }
 
 }