diff --git a/wp-admin/includes/schema.php b/wp-admin/includes/schema.php
index aa932ee25a..0ccf674a8a 100644
--- a/wp-admin/includes/schema.php
+++ b/wp-admin/includes/schema.php
@@ -132,7 +132,8 @@ CREATE TABLE $wpdb->users (
   user_status int(11) NOT NULL default '0',
   display_name varchar(250) NOT NULL default '',
   PRIMARY KEY  (ID),
-  KEY user_login_key (user_login)
+  KEY user_login_key (user_login),
+  KEY user_nicename (user_nicename)
 ) $charset_collate;
 CREATE TABLE $wpdb->usermeta (
   umeta_id bigint(20) NOT NULL auto_increment,
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 799e63507e..e3d4631359 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -3,6 +3,6 @@
 // This holds the version number in a separate file so we can bump it without cluttering the SVN
 
 $wp_version = '2.3-beta3';
-$wp_db_version = 6039;
+$wp_db_version = 6075;
 
 ?>