diff --git a/application/forms/IcingaHostGroupForm.php b/application/forms/IcingaHostGroupForm.php
index 1a16a4d1..21f1cb6c 100644
--- a/application/forms/IcingaHostGroupForm.php
+++ b/application/forms/IcingaHostGroupForm.php
@@ -26,7 +26,7 @@ class IcingaHostGroupForm extends DirectorObjectForm
     {
         $this->addAssignFilter(array(
             'columns' => IcingaHost::enumProperties($this->db, 'host.'),
-            'required' => true,
+            'required' => false,
             'description' => $this->translate(
                 'This allows you to configure an assignment filter. Please feel'
                 . ' free to combine as many nested operators as you want'