diff --git a/module/file/control.php b/module/file/control.php
index 6d9a438dfc..b6350ffc19 100644
--- a/module/file/control.php
+++ b/module/file/control.php
@@ -223,7 +223,7 @@ class file extends control
         if(strpos($fileName, $extension) === false) $fileName .= $extension;
 
         /* urlencode the filename for ie. */
-        if(strpos($this->server->http_user_agent, 'Trident') !== false) $fileName = urlencode($fileName);
+        if(strpos($this->server->http_user_agent, 'MSIE') !== false or strpos($this->server->http_user_agent, 'Trident') !== false) $fileName = urlencode($fileName);
 
         /* Judge the content type. */
         $mimes = $this->config->file->mimes;