diff --git a/wp-admin/setup-config.php b/wp-admin/setup-config.php
index 78f52fa96..636574915 100644
--- a/wp-admin/setup-config.php
+++ b/wp-admin/setup-config.php
@@ -1,8 +1,9 @@
 <?php
 define('WP_INSTALLING', true);
-//These two defines are required to allow us to use require_wp_db() to load the database class while being wp-content/wp-db.php aware
+//These three defines are required to allow us to use require_wp_db() to load the database class while being wp-content/wp-db.php aware
 define('ABSPATH', dirname(dirname(__FILE__)).'/');
 define('WPINC', 'wp-includes');
+define('WP_CONTENT_DIR', ABSPATH . 'wp-content');
 
 require_once('../wp-includes/compat.php');
 require_once('../wp-includes/functions.php');