diff --git a/modules/ticket/back/methods/sale/refund.js b/modules/ticket/back/methods/sale/refund.js
index 83a420a8e..8cdb28b24 100644
--- a/modules/ticket/back/methods/sale/refund.js
+++ b/modules/ticket/back/methods/sale/refund.js
@@ -56,7 +56,7 @@ module.exports = Self => {
                 salesIds.push(null);
 
             const servicesIds = [];
-            if (services) {
+            if (services.length) {
                 for (let service of services)
                     servicesIds.push(service.id);
             } else