diff --git a/inc/auth/mysql.class.php b/inc/auth/mysql.class.php
index b1c6a3a52c0df3cb34722f6e36d62b35bad0e13f..ca607ced5bc1bd127070c992bb8d5a3efd63f64b 100644
--- a/inc/auth/mysql.class.php
+++ b/inc/auth/mysql.class.php
@@ -8,9 +8,6 @@
  * @author     Matthias Grimm <matthias.grimmm@sourceforge.net>
 */
 
-define('DOKU_AUTH', dirname(__FILE__));
-require_once(DOKU_AUTH.'/basic.class.php');
-
 class auth_mysql extends auth_basic {
 
     var $dbcon        = 0;
diff --git a/inc/auth/pgsql.class.php b/inc/auth/pgsql.class.php
index a6da56af50ca31ac04a8afb345527a24daf32d94..8e68e865ed0da6d00b6d8840bd181f6b7bfbf01f 100644
--- a/inc/auth/pgsql.class.php
+++ b/inc/auth/pgsql.class.php
@@ -11,8 +11,7 @@
  * @author     Matthias Grimm <matthias.grimmm@sourceforge.net>
 */
 
-define('DOKU_AUTH', dirname(__FILE__));
-require_once(DOKU_AUTH.'/mysql.class.php');
+require_once(DOKU_INC.'inc/auth/mysql.class.php');
 
 class auth_pgsql extends auth_mysql {
 
diff --git a/inc/auth/plain.class.php b/inc/auth/plain.class.php
index 96649e3c42d8cf753f3967b339d43f537a792d45..af4fadb365e8d6c8452da023459fca37d602f21a 100644
--- a/inc/auth/plain.class.php
+++ b/inc/auth/plain.class.php
@@ -7,9 +7,6 @@
  * @author     Chris Smith <chris@jalakai.co.uk>
  */
 
-define('DOKU_AUTH', dirname(__FILE__));
-require_once(DOKU_AUTH.'/basic.class.php');
-
 define('AUTH_USERFILE',DOKU_CONF.'users.auth.php');
 
 class auth_plain extends auth_basic {