diff --git a/htdocs/conf/conf.class.php b/htdocs/conf/conf.class.php
index bff30a9f886..5ab15b2145c 100644
--- a/htdocs/conf/conf.class.php
+++ b/htdocs/conf/conf.class.php
@@ -277,14 +277,14 @@ class Conf
 		$this->prelevement->dir_temp  =DOL_DATA_ROOT."/prelevement/temp";
 		// Module webcal
 		$this->webcal->enabled=defined('MAIN_MODULE_WEBCALENDAR')?MAIN_MODULE_WEBCALENDAR:0;
-		$this->webcal->db->type=defined('PHPWEBCALENDAR_TYPE')?PHPWEBCALENDAR_TYPE:'mysql';
+		$this->webcal->db->type=defined('PHPWEBCALENDAR_TYPE')?PHPWEBCALENDAR_TYPE:'__dolibarr_main_db_type__';
 		$this->webcal->db->host=defined('PHPWEBCALENDAR_HOST')?PHPWEBCALENDAR_HOST:'';
 		$this->webcal->db->user=defined('PHPWEBCALENDAR_USER')?PHPWEBCALENDAR_USER:'';
 		$this->webcal->db->pass=defined('PHPWEBCALENDAR_PASS')?PHPWEBCALENDAR_PASS:'';
 		$this->webcal->db->name=defined('PHPWEBCALENDAR_DBNAME')?PHPWEBCALENDAR_DBNAME:'';
 		// Module mantis
 		$this->mantis->enabled=defined('MAIN_MODULE_MANTIS')?MAIN_MODULE_MANTIS:0;
-		$this->mantis->db->type=defined('PHPMANTIS_TYPE')?PHPMANTIS_TYPE:'mysql';
+		$this->mantis->db->type=defined('PHPMANTIS_TYPE')?PHPMANTIS_TYPE:'__dolibarr_main_db_type__';
 		$this->mantis->db->host=defined('PHPMANTIS_HOST')?PHPMANTIS_HOST:'';
 		$this->mantis->db->user=defined('PHPMANTIS_USER')?PHPMANTIS_USER:'';
 		$this->mantis->db->pass=defined('PHPMANTIS_PASS')?PHPMANTIS_PASS:'';