diff --git a/classes/User.class.php b/classes/User.class.php
index 1463fc2..168f11e 100644
--- a/classes/User.class.php
+++ b/classes/User.class.php
@@ -20,11 +20,11 @@ class User
             return false;
         }
 
-        if(!preg_match("/^[a-z0-9_-]{3,50}$/i", $login)) {
+        if(!preg_match(UserData::REGEXP_LOGIN, $login)) {
             return false;
         }
 
-        self::setInfo(self::getByLogin(strtolower($login)));
+        self::setInfo(self::getByLogin($login));
 		if (!self::getInfo() || self::$user->isBanned()) {
             return false;
         }