diff --git a/htdocs/install/upgrade.php b/htdocs/install/upgrade.php
index 359980763b0..c001a771f06 100644
--- a/htdocs/install/upgrade.php
+++ b/htdocs/install/upgrade.php
@@ -198,9 +198,9 @@ if (! GETPOST("action") || preg_match('/upgrade/i',GETPOST('action')))
         {
 			$dbversion_disallowed=array(
 				array('type'=>'mysql','version'=>array(5,5,40)),
-				array('type'=>'mysqli','version'=>array(5,5,40)),
-				array('type'=>'mysql','version'=>array(5,5,41)),
-				array('type'=>'mysqli','version'=>array(5,5,41))
+				array('type'=>'mysqli','version'=>array(5,5,40)) //,
+				//array('type'=>'mysql','version'=>array(5,5,41)),
+				//array('type'=>'mysqli','version'=>array(5,5,41))
 			);
 			$listofforbiddenversion='';
 			foreach ($dbversion_disallowed as $dbversion_totest)