diff --git a/system/library/acpsystem.php b/system/library/acpsystem.php
index ce21d8b2..ac0ccbb2 100644
--- a/system/library/acpsystem.php
+++ b/system/library/acpsystem.php
@@ -561,7 +561,7 @@ public static function checkdate($time)
 
     public static function passwdkey($passwd)
     {
-        return md5(sha1($passwd));
+        return md5($passwd);
     }
 
     public static function mail($name, $text, $mail)