diff --git a/src/backups.js b/src/backups.js
index 2e3d470c5..74bedfc09 100644
--- a/src/backups.js
+++ b/src/backups.js
@@ -993,7 +993,7 @@ function rotateBoxBackup(backupConfig, tag, options, appBackupIds, progressCallb
     assert.strictEqual(typeof progressCallback, 'function');
     assert.strictEqual(typeof callback, 'function');
 
-    const backupId = `${tag}/box_${constants.VERSION}`;
+    const backupId = `${tag}/box_v${constants.VERSION}`;
     const format = backupConfig.format;
 
     debug(`Rotating box backup to id ${backupId}`);