diff --git a/thinkphp/library/think/route/dispatch/Url.php b/thinkphp/library/think/route/dispatch/Url.php
index 00dc8cca3..5160cba19 100755
--- a/thinkphp/library/think/route/dispatch/Url.php
+++ b/thinkphp/library/think/route/dispatch/Url.php
@@ -60,7 +60,7 @@ class Url extends Dispatch
             $controller = !empty($path) ? array_shift($path) : null;
         }
 
-        if ($controller && !preg_match('/^[A-Za-z][\w|\.]*$/', $controller)) {
+        if ($controller && !preg_match('/^[A-Za-z](\w|\.)*$/', $controller)) {
             throw new HttpException(404, 'controller not exists:' . $controller);
         }