diff --git a/main/inc/lib/formvalidator/Rule/Username.php b/main/inc/lib/formvalidator/Rule/Username.php
index 0ca216825c..d97c14b4bf 100644
--- a/main/inc/lib/formvalidator/Rule/Username.php
+++ b/main/inc/lib/formvalidator/Rule/Username.php
@@ -34,7 +34,7 @@ class HTML_QuickForm_Rule_Username extends HTML_QuickForm_Rule
 	 */
 	function validate($username)
 	{
-		$filtered_username = eregi_replace('[^a-z0-9_.-@]', '_', strtr($username, 'ÀÁÂÃÄÅàáâãäåÒÓÔÕÖØòóôõöøÈÉÊËèéêëÇçÌÍÎÏìíîïÙÚÛÜùúûüÿÑñ', 'AAAAAAaaaaaaOOOOOOooooooEEEEeeeeCcIIIIiiiiUUUUuuuuyNn'));
+		$filtered_username = eregi_replace('[^a-z0-9_.-@-]', '_', strtr($username, '�����������������������������������������������������', 'AAAAAAaaaaaaOOOOOOooooooEEEEeeeeCcIIIIiiiiUUUUuuuuyNn'));
 		return $filtered_username == $username;
 	}
 }