diff --git a/index.php b/index.php
index 9cbb0f5..f93563c 100755
--- a/index.php
+++ b/index.php
@@ -7,6 +7,7 @@
         'models'      => [
             // a camelCased model name results in Kirby\Exception\NotFoundException
             'simplepagemodel' => [
+                'type'=> null,
                 'fields' => [
                     'id'    => function ($page) {
                         return $page->id();