diff --git a/index.php b/index.php
index f59820f25..b58b02fe5 100644
--- a/index.php
+++ b/index.php
@@ -51,7 +51,7 @@ if ($CURRENT_PATH!='')
 	$CURRENT_PATH.='/';
 	
 // set environment first
-ini_set('include_path', ini_get('include_path').PATH_SEPARATOR.$INSTALL_PATH.PATH_SEPARATOR.$CURRENT_PATH.'program'.PATH_SEPARATOR.$CURRENT_PATH.'program/lib');
+ini_set('include_path', $INSTALL_PATH.PATH_SEPARATOR.$CURRENT_PATH.'program'.PATH_SEPARATOR.$CURRENT_PATH.'program/lib'.PATH_SEPARATOR.ini_get('include_path'));
 ini_set('session.name', 'sessid');
 ini_set('session.use_cookies', 1);
 ini_set('error_reporting', E_ALL&~E_NOTICE);