diff --git a/interface/web/sites/form/shell_user.tform.php b/interface/web/sites/form/shell_user.tform.php
index 8ad815998caab3912ef446fdbb8b4457c093000c..db4efe34e9e116caf09523256cc3360a16dd2b08 100644
--- a/interface/web/sites/form/shell_user.tform.php
+++ b/interface/web/sites/form/shell_user.tform.php
@@ -97,7 +97,7 @@ $form["tabs"]['shell'] = array (
 							'type' => 'CUSTOM',
 							'class' => 'validate_systemuser',
 							'function' => 'check_sysuser',
-							'check_names' => true,
+							'check_names' => false,
 							'errmsg' => 'invalid_username_txt'
 						),
 			),
diff --git a/interface/web/sites/form/web_domain.tform.php b/interface/web/sites/form/web_domain.tform.php
index 04b0e1290a4acb87e6eea94cce04e79f0d2345b8..f270de30f740add1031a59d4e64c6a5e9906f238 100644
--- a/interface/web/sites/form/web_domain.tform.php
+++ b/interface/web/sites/form/web_domain.tform.php
@@ -603,7 +603,7 @@ if($_SESSION["s"]["user"]["typ"] == 'admin') {
 						1 => array(
 							'type' => 'CUSTOM',
 							'class' => 'validate_systemuser',
-							'function' => 'check_sysuser',
+							'function' => 'check_sysgroup',
 							'check_names' => true,
 							'errmsg' => 'invalid_system_user_or_group_txt'
 						),