diff --git a/src/wp-includes/ms-functions.php b/src/wp-includes/ms-functions.php
index 42e4f04110..a2e71ba32f 100644
--- a/src/wp-includes/ms-functions.php
+++ b/src/wp-includes/ms-functions.php
@@ -2069,10 +2069,10 @@ function maybe_redirect_404() {
 }
 
 /**
- * Add a new user to a blog by visiting /newbloguser/username/.
+ * Add a new user to a blog by visiting /newbloguser/{key}/.
  *
  * This will only work when the user's details are saved as an option
- * keyed as 'new_user_x', where 'x' is the username of the user to be
+ * keyed as 'new_user_{key}', where '{key}' is a hash generated for the user to be
  * added, as when a user is invited through the regular WP Add User interface.
  *
  * @since MU (3.0.0)