diff --git a/interface/web/mail/form/mail_user.tform.php b/interface/web/mail/form/mail_user.tform.php
index 8b80deab24f01d9312c20c85b65bdf71ff4658f8..9b4ff8fefdb6d0bc572c9d1fd410e63cc5421971 100644
--- a/interface/web/mail/form/mail_user.tform.php
+++ b/interface/web/mail/form/mail_user.tform.php
@@ -203,6 +203,14 @@ $form["tabs"]['mailuser'] = array(
 			'width'  => '30',
 			'maxlength' => '255'
 		),
+		'maildir_format' => array (
+			'datatype' => 'VARCHAR',
+			'formtype' => 'TEXT',
+			'default' => '',
+			'value'  => '',
+			'width'  => '30',
+			'maxlength' => '255'
+		),
 		'homedir' => array (
 			'datatype' => 'VARCHAR',
 			'formtype' => 'TEXT',