diff --git a/synchro/synchro_exec.php b/synchro/synchro_exec.php
index 457a6452b..562d07e66 100644
--- a/synchro/synchro_exec.php
+++ b/synchro/synchro_exec.php
@@ -28,12 +28,13 @@
 // - reconciliation is made on the first column
 //
 // Known issues
-// - ALMOST impossible to troubleshoot when an externl key has a wrong value
+// - ALMOST impossible to troubleshoot when an external key has a wrong value
 // - no character escaping in the xml output (yes !?!?!)
 // - not outputing xml when a wrong input is given (class, attribute names)
 //
 
-require_once('../approot.inc.php');
+if (!defined('__DIR__')) define('__DIR__', dirname(__FILE__));
+require_once(__DIR__.'/../approot.inc.php');
 require_once(APPROOT.'/application/application.inc.php');
 require_once(APPROOT.'/application/webpage.class.inc.php');
 require_once(APPROOT.'/application/csvpage.class.inc.php');
diff --git a/synchro/synchro_import.php b/synchro/synchro_import.php
index 720c28734..586803ddc 100644
--- a/synchro/synchro_import.php
+++ b/synchro/synchro_import.php
@@ -28,7 +28,8 @@
 // - reconciliation is made on the column primary_key
 //
 
-require_once('../approot.inc.php');
+if (!defined('__DIR__')) define('__DIR__', dirname(__FILE__));
+require_once(__DIR__.'/../approot.inc.php');
 require_once(APPROOT.'/application/application.inc.php');
 require_once(APPROOT.'/application/webpage.class.inc.php');
 require_once(APPROOT.'/application/csvpage.class.inc.php');