diff --git a/src/wp-includes/comment-template.php b/src/wp-includes/comment-template.php
index a27764b93f..f52c4989ff 100644
--- a/src/wp-includes/comment-template.php
+++ b/src/wp-includes/comment-template.php
@@ -1867,7 +1867,8 @@ function post_reply_link( $args = array(), $post = null ) {
  *
  * @since 2.7.0
  *
- * @param string $text Optional. Text to display for cancel reply link. Default empty.
+ * @param string $text Optional. Text to display for cancel reply link. If empty,
+ *                     defaults to 'Click here to cancel reply'. Default empty.
  * @return string
  */
 function get_cancel_comment_reply_link( $text = '' ) {
@@ -1897,7 +1898,8 @@ function get_cancel_comment_reply_link( $text = '' ) {
  *
  * @since 2.7.0
  *
- * @param string $text Optional. Text to display for cancel reply link. Default empty.
+ * @param string $text Optional. Text to display for cancel reply link. If empty,
+ *                     defaults to 'Click here to cancel reply'. Default empty.
  */
 function cancel_comment_reply_link( $text = '' ) {
 	echo get_cancel_comment_reply_link( $text );