diff --git a/core/modules/book/book.module b/core/modules/book/book.module
index b5d5515..75ef787 100644
--- a/core/modules/book/book.module
+++ b/core/modules/book/book.module
@@ -145,7 +145,7 @@ function book_form_node_form_alter(&$form, FormStateInterface $form_state, $form
     }
   }
 
-  if ($access) {
+  if ($access && book_type_is_allowed($node->getType())) {
     $collapsed = !($node->isNew() && !empty($node->book['pid']));
     $form = \Drupal::service('book.manager')->addFormElements($form, $form_state, $node, $account, $collapsed);
     // The "js-hide" class hides submit button when Javascript is enabled.