diff --git a/htdocs/admin/facture_situation.php b/htdocs/admin/facture_situation.php
index 5aeb09bb789..e3d2bf278a9 100644
--- a/htdocs/admin/facture_situation.php
+++ b/htdocs/admin/facture_situation.php
@@ -104,7 +104,7 @@ $arrayAvailableType = array(
 	Facture::TYPE_SITUATION => $langs->trans("InvoiceSituation"),
 	Facture::TYPE_STANDARD.'+'.Facture::TYPE_SITUATION => $langs->trans("InvoiceSituation").' + '.$langs->trans("InvoiceStandard"),
 );
-$selected = $conf->global->{$confkey};
+$selected = $conf->global->$confkey;
 $curentInput = (empty($inputCount) ? 1 : ($inputCount + 1));
 $formSelectInvoiceType = $form->selectarray('value'.$curentInput, $arrayAvailableType, $selected, 1);
 _printInputFormPart($confkey, $langs->trans('AllowedInvoiceForRetainedWarranty'), '', array(), $formSelectInvoiceType);