diff --git a/htdocs/compta/facture/list.php b/htdocs/compta/facture/list.php
index 51257583ef7..5e8507e7229 100644
--- a/htdocs/compta/facture/list.php
+++ b/htdocs/compta/facture/list.php
@@ -215,8 +215,8 @@ $arrayfields = array(
 	'f.date_valid'=>array('label'=>"DateValidation", 'checked'=>0, 'position'=>22),
 	'f.date_lim_reglement'=>array('label'=>"DateDue", 'checked'=>1, 'position'=>25),
 	'f.date_closing'=>array('label'=>"DateClosing", 'checked'=>0, 'position'=>30),
-	'p.ref'=>array('label'=>"ProjectRef", 'checked'=>1, 'enabled'=>(empty($conf->project->enabled) ? 0 : 1), 'position'=>40),
-	'p.title'=>array('label'=>"ProjectLabel", 'checked'=>0, 'enabled'=>(empty($conf->project->enabled) ? 0 : 1), 'position'=>41),
+	'p.ref'=>array('label'=>"ProjectRef", 'checked'=>1, 'enabled'=>(!isModEnabled('project') ? 0 : 1), 'position'=>40),
+	'p.title'=>array('label'=>"ProjectLabel", 'checked'=>0, 'enabled'=>(!isModEnabled('project') ? 0 : 1), 'position'=>41),
 	's.nom'=>array('label'=>"ThirdParty", 'checked'=>1, 'position'=>50),
 	's.name_alias'=>array('label'=>"AliasNameShort", 'checked'=>1, 'position'=>51),
 	's.town'=>array('label'=>"Town", 'checked'=>-1, 'position'=>55),