diff --git a/application/controllers/cache.php b/application/controllers/cache.php
index fe4522a1..8bc7cbde 100644
--- a/application/controllers/cache.php
+++ b/application/controllers/cache.php
@@ -151,7 +151,7 @@ class Cache extends CI_Controller
             {
                 if ($f!='.' && $f!='..' && (strpos($dir, '/cn/')===false) && (strpos($dir, '/amp/')===false) && (strpos($f, '.pdf')===false))
                 {
-                    $encode = mb_detect_encoding($f, array("Western","ASCII",'UTF-8',"GB2312","GBK",'BIG5')); 
+                    $encode = mb_detect_encoding($f, array("ASCII",'UTF-8',"GB2312","GBK",'BIG5')); 
                     $_f = mb_convert_encoding ($f, 'UTF-8', 'GBK');
                     $_dir = mb_convert_encoding ($dir, 'UTF-8', 'GBK');