Index: wp-admin/includes/class-wp-list-table.php
===================================================================
--- wp-admin/includes/class-wp-list-table.php	(revision 44973)
+++ wp-admin/includes/class-wp-list-table.php	(working copy)
@@ -535,7 +535,7 @@
 	 *
 	 * @since 3.1.0
 	 *
-	 * @global wpdb      $wpdb
+	 * @global wpdb $wpdb WordPress database abstraction object.
 	 * @global WP_Locale $wp_locale
 	 *
 	 * @param string $post_type
Index: wp-admin/includes/class-wp-ms-sites-list-table.php
===================================================================
--- wp-admin/includes/class-wp-ms-sites-list-table.php	(revision 44973)
+++ wp-admin/includes/class-wp-ms-sites-list-table.php	(working copy)
@@ -64,7 +64,7 @@
 	 *
 	 * @global string $s
 	 * @global string $mode
-	 * @global wpdb   $wpdb
+	 * @global wpdb   $wpdb WordPress database abstraction object.
 	 */
 	public function prepare_items() {
 		global $s, $mode, $wpdb;
Index: wp-admin/includes/class-wp-posts-list-table.php
===================================================================
--- wp-admin/includes/class-wp-posts-list-table.php	(revision 44973)
+++ wp-admin/includes/class-wp-posts-list-table.php	(working copy)
@@ -67,7 +67,7 @@
 	 * @see WP_List_Table::__construct() for more information on default arguments.
 	 *
 	 * @global WP_Post_Type $post_type_object
-	 * @global wpdb         $wpdb
+	 * @global wpdb $wpdb WordPress database abstraction object.
 	 *
 	 * @param array $args An associative array of arguments.
 	 */
@@ -738,7 +738,7 @@
 	}
 
 	/**
-	 * @global wpdb    $wpdb
+	 * @global wpdb $wpdb WordPress database abstraction object.
 	 * @global WP_Post $post
 	 * @param array $pages
 	 * @param int $pagenum
Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 44973)
+++ wp-admin/includes/schema.php	(working copy)
@@ -11,7 +11,7 @@
 /**
  * Declare these as global in case schema.php is included from a function.
  *
- * @global wpdb   $wpdb
+ * @global wpdb   $wpdb WordPress database abstraction object.
  * @global array  $wp_queries
  * @global string $charset_collate
  */