diff --git a/htdocs/comm/card.php b/htdocs/comm/card.php
index 4a97dc0f98c..9b385ea7ead 100644
--- a/htdocs/comm/card.php
+++ b/htdocs/comm/card.php
@@ -943,7 +943,7 @@ if ($object->id > 0)
 				$late = '';
 				foreach ($contrat->lines as $line) {
 					if ($contrat->statut == Contrat::STATUS_VALIDATED && $line->statut == ContratLigne::STATUS_OPEN) {
-						if (($line->date_fin_validite + $conf->contrat->services->expires->warning_delay) < $now) $late = img_warning($langs->trans("Late"));
+						if (((!empty($line->date_fin_validite)?$line->date_fin_validite:0) + $conf->contrat->services->expires->warning_delay) < $now) $late = img_warning($langs->trans("Late"));
 					}
 				}