diff --git a/interface/web/admin/form/server_config.tform.php b/interface/web/admin/form/server_config.tform.php
index 521af815f70501de6403cab670459c16e90043cc..b31aace32c3ab5e511fabcbe2cd22d0857b18495 100644
--- a/interface/web/admin/form/server_config.tform.php
+++ b/interface/web/admin/form/server_config.tform.php
@@ -1544,7 +1544,7 @@ $form["tabs"]['dns'] = array(
 			'formtype' => 'TEXT',
 			'default' => '',
 			'validators' => array( 0 => array ( 	'type' => 'REGEX',
-										'regex' => '/^\/[a-zA-Z0-9\.\-\_\/]{1,128}$/',
+										'regex' => '/^[a-zA-Z0-9\.\-\_\/]{0,128}$/',
 										'errmsg'=> 'bind_zonefiles_masterprefix_error_regex'),
 			),
 			'value' => '',
@@ -1556,7 +1556,7 @@ $form["tabs"]['dns'] = array(
 			'formtype' => 'TEXT',
 			'default' => '',
 			'validators' => array( 0 => array ( 	'type' => 'REGEX',
-										'regex' => '/^\/[a-zA-Z0-9\.\-\_\/]{1,128}$/',
+										'regex' => '/^[a-zA-Z0-9\.\-\_\/]{0,128}$/',
 										'errmsg'=> 'bind_zonefiles_slaveprefix_error_regex'),
 			),
 			'value' => '',