diff --git a/codebase/db_mysql.php b/codebase/db_mysql.php
index d31d210..e5f7127 100644
--- a/codebase/db_mysql.php
+++ b/codebase/db_mysql.php
@@ -2,6 +2,8 @@
 
 /*! Implementation of DataWrapper for MySQL
 **/
+require_once("db_common.php");
+
 class MySQLDBDataWrapper extends DBDataWrapper{
 	protected $last_result;
 	public function query($sql){
diff --git a/codebase/db_mysqli.php b/codebase/db_mysqli.php
index 6740a3b..11d9d91 100644
--- a/codebase/db_mysqli.php
+++ b/codebase/db_mysqli.php
@@ -3,7 +3,7 @@
 	@author dhtmlx.com
 	@license GPL, see license.txt
 */
-require_once("db_common.php");
+require_once("db_mysql.php");
 
 class MySQLiDBDataWrapper extends MySQLDBDataWrapper{