diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 32505622a85..d5e24eb61f8 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -29,13 +29,13 @@
  */
 
 require '../main.inc.php';
-require DOL_DOCUMENT_ROOT . '/compta/facture/class/facture.class.php';
-require DOL_DOCUMENT_ROOT . '/compta/paiement/class/paiement.class.php';
-require DOL_DOCUMENT_ROOT . '/core/modules/facture/modules_facture.php';
-require DOL_DOCUMENT_ROOT . '/core/class/discount.class.php';
-require DOL_DOCUMENT_ROOT . '/core/class/html.formfile.class.php';
-require DOL_DOCUMENT_ROOT . '/core/class/html.formother.class.php';
-require DOL_DOCUMENT_ROOT . '/core/lib/invoice.lib.php';
+require_once DOL_DOCUMENT_ROOT . '/compta/facture/class/facture.class.php';
+require_once DOL_DOCUMENT_ROOT . '/compta/paiement/class/paiement.class.php';
+require_once DOL_DOCUMENT_ROOT . '/core/modules/facture/modules_facture.php';
+require_once DOL_DOCUMENT_ROOT . '/core/class/discount.class.php';
+require_once DOL_DOCUMENT_ROOT . '/core/class/html.formfile.class.php';
+require_once DOL_DOCUMENT_ROOT . '/core/class/html.formother.class.php';
+require_once DOL_DOCUMENT_ROOT . '/core/lib/invoice.lib.php';
 require_once DOL_DOCUMENT_ROOT . '/core/lib/functions2.lib.php';
 require_once DOL_DOCUMENT_ROOT . '/core/lib/date.lib.php';