diff -u b/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
--- b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -129,7 +129,7 @@
   protected $isDefaultRevision = TRUE;
 
   /**
-   * Indicates whether this is an editable revision.
+   * Indicates whether the revision id should be kept on new revisions.
    *
    * @var bool
    */