diff --git a/wp-includes/author-template.php b/wp-includes/author-template.php
index 1e65baa1e6..1b6a948dc5 100644
--- a/wp-includes/author-template.php
+++ b/wp-includes/author-template.php
@@ -244,7 +244,7 @@ function get_author_posts_url($author_id, $author_nicename = '') {
  * <li>optioncount (boolean) (false): Show the count in parenthesis next to the
  * author's name.</li>
  * <li>exclude_admin (boolean) (true): Exclude the 'admin' user that is
- * installed bydefault.</li>
+ * installed by default.</li>
  * <li>show_fullname (boolean) (false): Show their full names.</li>
  * <li>hide_empty (boolean) (true): Don't show authors without any posts.</li>
  * <li>feed (string) (''): If isn't empty, show links to author's feeds.</li>