diff --git a/src/wp-includes/feed.php b/src/wp-includes/feed.php
index eef23318b4..59f6fa2f29 100644
--- a/src/wp-includes/feed.php
+++ b/src/wp-includes/feed.php
@@ -293,7 +293,7 @@ function get_comment_guid($comment_id = null) {
  * @since 1.5.0
  * @since 4.4.0 Introduced the `$comment` argument.
  *
- * @param int|WP_Comment $comment Optional comment object or id. Defaults to global comment object.
+ * @param int|WP_Comment $comment Optional. Comment object or id. Defaults to global comment object.
  */
 function comment_link( $comment = null ) {
 	/**