diff --git a/wp-admin/includes/meta-boxes.php b/wp-admin/includes/meta-boxes.php
index 5a4d57e0c1..902bf95876 100644
--- a/wp-admin/includes/meta-boxes.php
+++ b/wp-admin/includes/meta-boxes.php
@@ -46,6 +46,7 @@ if ( 'publish' == $post->post_status ) {
 	 * Filter the URI of a post preview in the post submit box.
 	 *
 	 * @since 2.0.5
+	 * @since 4.0.0 $post parameter was added.
 	 *
 	 * @param string  $preview_link URI the user will be directed to for a post preview.
 	 * @param WP_Post $post         Post object.