diff --git a/htdocs/salaries/document.php b/htdocs/salaries/document.php
index 971291580bf..e35f2bd1f7e 100644
--- a/htdocs/salaries/document.php
+++ b/htdocs/salaries/document.php
@@ -35,7 +35,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/html.formfile.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/salaries.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/salaries/class/salary.class.php';
-if (!empty($conf->project->enabled)) {
+if (isModEnabled('project')) {
 	require_once DOL_DOCUMENT_ROOT.'/projet/class/project.class.php';
 	require_once DOL_DOCUMENT_ROOT.'/core/class/html.formprojet.class.php';
 }
@@ -132,7 +132,7 @@ if ($action == 'setlabel' && $user->rights->salaries->write) {
  */
 
 $form = new Form($db);
-if (!empty($conf->project->enabled)) $formproject = new FormProjets($db);
+if (isModEnabled('projet')) $formproject = new FormProjets($db);
 
 $title = $langs->trans('Salary')." - ".$langs->trans('Documents');
 $help_url = "";
@@ -176,7 +176,7 @@ if ($object->id) {
 	$morehtmlref .= '<br>'.$langs->trans('Employee').' : '.$userstatic->getNomUrl(-1);
 
 	// Project
-	if (!empty($conf->project->enabled)) {
+	if (isModEnabled('projet')) {
 		$morehtmlref .= '<br>'.$langs->trans('Project').' ';
 		if ($user->rights->salaries->write) {
 			if ($action != 'classify') {