diff --git a/src/Form/NodeownershipClaimSettings.php b/src/Form/NodeownershipClaimSettings.php
index 757175c..baca0a8 100644
--- a/src/Form/NodeownershipClaimSettings.php
+++ b/src/Form/NodeownershipClaimSettings.php
@@ -41,11 +41,13 @@ class NodeownershipClaimSettings extends ConfigFormBase {
       $options[$node_type] = $node_type;
     }
 
+    $default_types = \Drupal::configFactory()->getEditable('nodeownership.settings')->get('nodeownership_node_types');
+
     $form['nodeownership_node_types'] = array(
       '#type' => 'checkboxes',
       '#title' => $this->t('Content types which can be claimed for ownership'),
       '#options' => $options,
-      '#default_value' => \Drupal::configFactory()->getEditable('nodeownership.settings')->get('nodeownership_node_types'),
+      '#default_value' => ($default_types) ? $default_types : [],
     );
 
     $form['nodeownership_link_text'] = array(