diff --git a/kcfinder/core/class/uploader.php b/kcfinder/core/class/uploader.php
index e98448c7..070cf0b0 100644
--- a/kcfinder/core/class/uploader.php
+++ b/kcfinder/core/class/uploader.php
@@ -150,7 +150,7 @@ class uploader {
 
         // SECURING THE SESSION
         $stamp = array(
-            'ip' => $_SERVER['REMOTE_HOST'], //$_SERVER['REMOTE_ADDR'] 2017-03-02 ycc CDN之后的ip会经常变，所以改为域名
+            'ip' => $_SERVER['HTTP_HOST'], //$_SERVER['REMOTE_ADDR'] 2017-03-02 ycc CDN之后的ip会经常变，所以改为域名
             'agent' => md5($_SERVER['HTTP_USER_AGENT'])
         );
         if (!isset($this->session['stamp']))