diff --git a/webui/module/Pool/config/module.config.php b/webui/module/Pool/config/module.config.php
index d5846f92ce1..546068ae7d0 100644
--- a/webui/module/Pool/config/module.config.php
+++ b/webui/module/Pool/config/module.config.php
@@ -43,7 +43,7 @@
           'route' => '/pool[/][:action][/][:id]',
           'constraints' => array(
             'action' => '[a-zA-Z][a-zA-Z0-9_-]*',
-            'id' => '[a-zA-Z][a-zA-Z0-9_-]*',
+            'id' => '[a-zA-Z0-9][a-zA-Z0-9\._-]*',
           ),
           'defaults' => array(
             'controller' => 'Pool\Controller\Pool',