diff --git a/core/modules/book/src/BookManager.php b/core/modules/book/src/BookManager.php
index e2a1f2f..7341faa 100644
--- a/core/modules/book/src/BookManager.php
+++ b/core/modules/book/src/BookManager.php
@@ -59,7 +59,7 @@ class BookManager implements BookManagerInterface {
   /**
    * Book Storage.
    *
-   * @var: \Drupal\book\BookStorageInteface
+   * @var \Drupal\book\BookStorageInteface
    */
   protected $bookStorage;
 
diff --git a/core/modules/book/tests/src/BookManagerTest.php b/core/modules/book/tests/src/BookManagerTest.php
index f26b41c..90315de 100644
--- a/core/modules/book/tests/src/BookManagerTest.php
+++ b/core/modules/book/tests/src/BookManagerTest.php
@@ -58,7 +58,7 @@ class BookManagerTest extends UnitTestCase {
   /**
    * Book Storage.
    *
-   * @var: \Drupal\book\BookStorageInteface
+   * @var \Drupal\book\BookStorageInteface
    */
   protected $bookStorage;