diff --git a/interface/web/admin/form/system_config.tform.php b/interface/web/admin/form/system_config.tform.php
index ce4a0cbfab29b453937ba700720d7b1dad6c80fa..c53d02bf30b90e9d8f8eb63bcfdb366105661fda 100644
--- a/interface/web/admin/form/system_config.tform.php
+++ b/interface/web/admin/form/system_config.tform.php
@@ -449,7 +449,7 @@ $form["tabs"]['misc'] = array (
 			'datatype' => 'VARCHAR',
 			'formtype' => 'TEXT',
 			'validators' => array ( 0 => array ( 'type' => 'REGEX',
-					'regex' => '/^[a-zA-Z0-0\-\_\[\]]{0,50}$/',
+					'regex' => '/^[a-zA-Z0-9\-\_\[\]]{0,50}$/',
 					'errmsg'=> 'customer_no_template_error_regex'),
 			),
 			'default' => '',