diff --git a/src/wp-admin/includes/revision.php b/src/wp-admin/includes/revision.php
index 3595226111..eb03e609c8 100644
--- a/src/wp-admin/includes/revision.php
+++ b/src/wp-admin/includes/revision.php
@@ -4,6 +4,7 @@
  *
  * @package WordPress
  * @subpackage Administration
+ * @since 3.6.0
  */
 
 /**