diff --git a/htdocs/compta/facture/card.php b/htdocs/compta/facture/card.php
index e4c4833005b..a9f862d5180 100644
--- a/htdocs/compta/facture/card.php
+++ b/htdocs/compta/facture/card.php
@@ -5780,8 +5780,8 @@ if ($action == 'create') {
 				}
 				// For down payment invoice (deposit)
 				if ($object->type == Facture::TYPE_DEPOSIT && $usercancreate && $object->statut > Facture::STATUS_DRAFT && empty($discount->id)) {
-					if (price2num($object->total_ttc, 'MT') == price2num($sumofpaymentall, 'MT') || ($object->type == Facture::STATUS_ABANDONED && in_array($object->close_code, array('bankcharge', 'discount_vat', 'other')))) {
-						// We can close a down payment only if paid amount is same than amount of down payment (by definition)
+					// We can close a down payment only if paid amount is same than amount of down payment (by definition). We can bypass this if hidden and unstable option DEPOSIT_AS_CREDIT_AVAILABLE_EVEN_UNPAID is set.
+					if (price2num($object->total_ttc, 'MT') == price2num($sumofpaymentall, 'MT') || getDolGlobalInt('DEPOSIT_AS_CREDIT_AVAILABLE_EVEN_UNPAID') || ($object->type == Facture::STATUS_ABANDONED && in_array($object->close_code, array('bankcharge', 'discount_vat', 'other')))) {
 						print '<a class="butAction'.($conf->use_javascript_ajax ? ' reposition' : '').'" href="'.$_SERVER["PHP_SELF"].'?facid='.$object->id.'&amp;action=converttoreduc">'.$langs->trans('ConvertToReduc').'</a>';
 					} else {
 						print '<span class="butActionRefused" title="'.$langs->trans("AmountPaidMustMatchAmountOfDownPayment").'">'.$langs->trans('ConvertToReduc').'</span>';