Index: src/wp-settings.php
===================================================================
--- src/wp-settings.php	(revision 45034)
+++ src/wp-settings.php	(working copy)
@@ -115,7 +115,11 @@
 require( ABSPATH . WPINC . '/class-wp-error.php' );
 require( ABSPATH . WPINC . '/pomo/mo.php' );
 
-// Include the wpdb class and, if present, a db.php database drop-in.
+/**
+ * Include the wpdb class and, if present, a db.php database drop-in.
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ */
 global $wpdb;
 require_wp_db();