diff --git a/htdocs/comm/propal/card.php b/htdocs/comm/propal/card.php
index 355232a65af..7b1a6113b36 100644
--- a/htdocs/comm/propal/card.php
+++ b/htdocs/comm/propal/card.php
@@ -321,7 +321,7 @@ if (empty($reshook))
 
 		$datep = dol_mktime(12, 0, 0, GETPOST('remonth'), GETPOST('reday'), GETPOST('reyear'));
 		$date_delivery = dol_mktime(12, 0, 0, GETPOST('date_livraisonmonth'), GETPOST('date_livraisonday'), GETPOST('date_livraisonyear'));
-		$duration = GETPOST('duree_validite');
+		$duration = GETPOST('duree_validite', 'int');
 
 		if (empty($datep)) {
 			setEventMessages($langs->trans("ErrorFieldRequired", $langs->transnoentitiesnoconv("Date")), null, 'errors');
@@ -1544,7 +1544,7 @@ if ($action == 'create')
 	print '</td></tr>';
 
 	// Validaty duration
-	print '<tr><td class="fieldrequired">' . $langs->trans("ValidityDuration") . '</td><td><input name="duree_validite" size="5" value="' . $conf->global->PROPALE_VALIDITY_DURATION . '"> ' . $langs->trans("days") . '</td></tr>';
+	print '<tr><td class="fieldrequired">' . $langs->trans("ValidityDuration") . '</td><td><input name="duree_validite" class="width50" value="' . (GETPOST('duree_validite', 'int') ? GETPOST('duree_validite', 'int') : $conf->global->PROPALE_VALIDITY_DURATION) . '"> ' . $langs->trans("days") . '</td></tr>';
 
 	// Terms of payment
 	print '<tr><td class="nowrap fieldrequired">' . $langs->trans('PaymentConditionsShort') . '</td><td>';