diff --git a/htdocs/compta/facture/class/api_invoices.class.php b/htdocs/compta/facture/class/api_invoices.class.php
index a864168d161..285d9d366f7 100644
--- a/htdocs/compta/facture/class/api_invoices.class.php
+++ b/htdocs/compta/facture/class/api_invoices.class.php
@@ -668,6 +668,8 @@ class Invoices extends DolibarrApi
 		$result = $this->invoice->delete(DolibarrApiAccess::$user);
 		if ($result < 0) {
 			throw new RestException(500, 'Error when deleting invoice');
+		} elseif ($result == 0) {
+			throw new RestException(403, 'Invoice not erasable');
 		}
 
 		return array(