diff --git a/htdocs/compta/facture/class/api_invoices.class.php b/htdocs/compta/facture/class/api_invoices.class.php
index a864168d161..6948ae850c7 100644
--- a/htdocs/compta/facture/class/api_invoices.class.php
+++ b/htdocs/compta/facture/class/api_invoices.class.php
@@ -666,7 +666,7 @@ class Invoices extends DolibarrApi
 		}
 
 		$result = $this->invoice->delete(DolibarrApiAccess::$user);
-		if ($result < 0) {
+		if ($result <= 0) {
 			throw new RestException(500, 'Error when deleting invoice');
 		}