diff -u b/core/lib/Drupal/Core/Entity/EntityInterface.php b/core/lib/Drupal/Core/Entity/EntityInterface.php
--- b/core/lib/Drupal/Core/Entity/EntityInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityInterface.php
@@ -214,7 +214,7 @@
   /**
    * Creates a duplicate of the entity.
    *
-   * @return $this
+   * @return static
    */
   public function createDuplicate();