diff --git a/wp-includes/ms-default-constants.php b/wp-includes/ms-default-constants.php
new file mode 100644
index 0000000000..a349aef21a
--- /dev/null
+++ b/wp-includes/ms-default-constants.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * Defines constants and global variables that can be overridden, generally in wp-config.php.
+ *
+ * @package WordPress
+ * @subpackage Multisite
+ */
+
+/**
+ * Defines Multisite default constants.
+ *
+ * @since 3.0.0
+ * @param $context
+ */
+function ms_default_constants( $context ) {
+	switch( $context ) {
+		case 'uploads' :
+			global $wpdb;
+			if ( !defined( 'UPLOADBLOGSDIR' ) )
+				define( 'UPLOADBLOGSDIR', 'wp-content/blogs.dir' );
+		
+			if ( !defined( 'UPLOADS' ) )
+				define( 'UPLOADS', UPLOADBLOGSDIR . "/{$wpdb->blogid}/files/" );
+		
+			if ( !defined( 'BLOGUPLOADDIR' ) )
+				define( 'BLOGUPLOADDIR', WP_CONTENT_DIR . "/blogs.dir/{$wpdb->blogid}/files/" );
+			break;
+		case 'cookies' :
+			global $current_site;
+			/**
+			 * It is possible to define this in wp-config.php
+			 * @since 1.2.0
+			 */
+			if ( !defined( 'COOKIEPATH' ) )
+					define( 'COOKIEPATH', $current_site->path );
+	
+			/**
+			 * It is possible to define this in wp-config.php
+			 * @since 1.5.0
+			 */
+			if ( !defined( 'SITECOOKIEPATH' ) )
+					define( 'SITECOOKIEPATH', $current_site->path );
+	
+			/**
+			 * It is possible to define this in wp-config.php
+			 * @since 2.6.0
+			 */
+			if ( !defined( 'ADMIN_COOKIE_PATH' ) ) {
+					if( !is_subdomain_install() ) {
+							define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH );
+					} else {
+							define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH . 'wp-admin' );
+					}
+			}
+			/**
+			 * It is possible to define this in wp-config.php
+			 * @since 2.0.0
+			 */
+			if ( !defined('COOKIE_DOMAIN') )
+					define('COOKIE_DOMAIN', '.' . $current_site->cookie_domain);
+			break;
+	}
+}
+?>
\ No newline at end of file