diff --git a/src/wp-signup.php b/src/wp-signup.php
index fa88ba9e8d..23a3b699b7 100644
--- a/src/wp-signup.php
+++ b/src/wp-signup.php
@@ -365,6 +365,7 @@ function validate_another_blog_signup() {
  *
  * @param string $domain The domain URL
  * @param string $path The site root path
+ * @param string $blog_title The blog title
  * @param string $user_name The username
  * @param string $user_email The user's email address
  * @param array $meta Any additional meta from the 'add_signup_meta' filter in validate_blog_signup()