diff --git a/interface/web/mail/form/mail_user.tform.php b/interface/web/mail/form/mail_user.tform.php
index 32e58686e28a16d312fd2884e3d3d0d1bc6e34cc..f513aeb9d3e4763f3f9947f91c9f00cba6e2d53b 100644
--- a/interface/web/mail/form/mail_user.tform.php
+++ b/interface/web/mail/form/mail_user.tform.php
@@ -166,7 +166,7 @@ $form["tabs"]['mailuser'] = array(
 					'regex' => '/^([0-9]{1,})$/',
 					'errmsg'=> 'quota_error_value'),
 			),
-			'default' => '-1',
+			'default' => '0',
 			'value'  => '',
 			'width'  => '30',
 			'maxlength' => '255'