diff --git a/@xen-orchestra/proxy/src/app/mixins/backups/index.js b/@xen-orchestra/proxy/src/app/mixins/backups/index.js
index e51590549..05c2cbbbc 100644
--- a/@xen-orchestra/proxy/src/app/mixins/backups/index.js
+++ b/@xen-orchestra/proxy/src/app/mixins/backups/index.js
@@ -205,7 +205,7 @@ export default class Backups {
             params: {
               backupId: { type: 'string' },
               remote: { type: 'object' },
-              settings: { type: 'object' },
+              settings: { type: 'object', optional: true },
               srUuid: { type: 'string' },
               streamLogs: { type: 'boolean', optional: true },
               xapi: { type: 'object' },