diff --git a/src/wp-includes/load.php b/src/wp-includes/load.php
index 7e5314c0d2..38b4b771b2 100644
--- a/src/wp-includes/load.php
+++ b/src/wp-includes/load.php
@@ -1031,6 +1031,9 @@ function is_blog_admin() {
  * Does not check if the user is an administrator; use current_user_can()
  * for checking roles and capabilities.
  *
+ * Does not check if the site is a Multisite network; use is_multisite()
+ * for checking if Multisite is enabled.
+ *
  * @since 3.1.0
  *
  * @global WP_Screen $current_screen