diff --git a/htdocs/fourn/paiement/document.php b/htdocs/fourn/paiement/document.php
index 58d04d097d5..b69e081cf16 100644
--- a/htdocs/fourn/paiement/document.php
+++ b/htdocs/fourn/paiement/document.php
@@ -35,7 +35,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/payments.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/images.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/fourn.lib.php';
-if (!empty($conf->project->enabled)) {
+if (isModEnabled('project')) {
 	require_once DOL_DOCUMENT_ROOT.'/projet/class/project.class.php';
 }