diff --git a/wp-admin/includes/meta-boxes.php b/wp-admin/includes/meta-boxes.php
index e28af8195..11f74d36e 100644
--- a/wp-admin/includes/meta-boxes.php
+++ b/wp-admin/includes/meta-boxes.php
@@ -230,7 +230,13 @@ if ( !in_array( $post->post_status, array('publish', 'future', 'private') ) || 0
 <?php
 }
 
-
+/**
+ * Display post format form elements.
+ *
+ * @since 3.1.0
+ *
+ * @param object $post
+ */
 function post_format_meta_box( $post, $box ) {
 	if ( current_theme_supports( 'post-formats' ) && post_type_supports( $post->post_type, 'post-formats' ) ) :
 	$post_formats = get_theme_support( 'post-formats' );