diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index d3800aceb76..6c5fe327517 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -1309,7 +1309,7 @@ class Form
 		$sql .= " ORDER BY a.label ASC";
 
 		dol_syslog("Form::select_address sql=".$sql);
-		$resql=$db->query($sql);
+		$resql=$this->db->query($sql);
 		if ($resql)
 		{
 			print '<select class="flat" name="'.$htmlname.'">';