diff --git a/htdocs/client.class.php b/htdocs/client.class.php
index 874e9c16d53..86764a9c123 100644
--- a/htdocs/client.class.php
+++ b/htdocs/client.class.php
@@ -32,7 +32,7 @@
 		\brief      Classe permettant la gestion des clients
 */
 
-include_once(DOL_DOCUMENT_ROOT."/societe.class.php");
+require_once(DOL_DOCUMENT_ROOT."/societe.class.php");
 
 
 class Client extends Societe