diff --git a/src/wp-admin/install.php b/src/wp-admin/install.php
index 2b8099b30c..9a11b1820e 100644
--- a/src/wp-admin/install.php
+++ b/src/wp-admin/install.php
@@ -87,6 +87,8 @@ function display_header( $body_classes = '' ) {
  *
  * @since 2.8.0
  *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
  * @param string|null $error
  */
 function display_setup_form( $error = null ) {