diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index e9b2728ad3f..a79cb494bd4 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -119,6 +119,8 @@ class Conf
 	 */
 	function setValues($db)
 	{
+		global $conf;
+
 		dol_syslog(get_class($this)."::setValues");
 
 		/*