diff --git a/application/common.php b/application/common.php
index 744476d31d28ec380caf0da38e5b9872b07a90e2..b7359b81189ff17541488406e8714aa4354e5a0e 100755
--- a/application/common.php
+++ b/application/common.php
@@ -41,7 +41,7 @@ if (!function_exists('format_bytes')) {
     function format_bytes($size, $delimiter = '', $precision = 2)
     {
         $units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
-        for ($i = 0; $size >= 1024 && $i < 6; $i++) {
+        for ($i = 0; $size >= 1024 && $i < 5; $i++) {
             $size /= 1024;
         }
         return round($size, $precision) . $delimiter . $units[$i];