diff --git a/packages/xo-server/src/xo-mixins/backups-ng/index.js b/packages/xo-server/src/xo-mixins/backups-ng/index.js
index 74446d33b..de755e5f2 100644
--- a/packages/xo-server/src/xo-mixins/backups-ng/index.js
+++ b/packages/xo-server/src/xo-mixins/backups-ng/index.js
@@ -1449,7 +1449,7 @@ export default class BackupNg {
               )
 
               if (handler._getFilePath !== undefined) {
-                await isValidXva(handler._getFilePath(dataFilename))
+                await isValidXva('/' + handler._getFilePath(dataFilename))
               }
 
               await handler.outputFile(metadataFilename, jsonMetadata)