diff --git a/core/modules/book/lib/Drupal/book/Controller/BookController.php b/core/modules/book/lib/Drupal/book/Controller/BookController.php
index 4067a74872aea3648534107629187c9a535d989c..8f66f779bd7944522c72a6f9ab9ea288b6cfcfa2 100644
--- a/core/modules/book/lib/Drupal/book/Controller/BookController.php
+++ b/core/modules/book/lib/Drupal/book/Controller/BookController.php
@@ -25,7 +25,7 @@ class BookController implements ContainerInjectionInterface {
   /**
    * The book manager.
    *
-   * @var BookManagerInterface
+   * @var \Drupal\book\BookManagerInterface
    */
   protected $bookManager;
 
@@ -39,7 +39,7 @@ class BookController implements ContainerInjectionInterface {
   /**
    * Constructs a BookController object.
    *
-   * @param BookManagerInterface $bookManager
+   * @param \Drupal\book\BookManagerInterface $bookManager
    *   The book manager.
    * @param \Drupal\book\BookExport $bookExport
    *   The book export service.