diff --git a/config/cookie.php b/config/cookie.php
index e066853e1..371d0e8ac 100644
--- a/config/cookie.php
+++ b/config/cookie.php
@@ -12,7 +12,7 @@
 // +----------------------------------------------------------------------
 // | Cookie设置
 // +----------------------------------------------------------------------
-$cookie_domain = MyFileConfig('common_cookie_domain', '', __MY_MAIN_DOMAIN__, true);
+$cookie_domain = MyFileConfig('common_cookie_domain', '', '', true);
 if(!empty($cookie_domain) && substr($cookie_domain, 0, 1) != '.')
 {
     $cookie_domain = '.'.$cookie_domain;