diff --git a/server.js b/server.js
index c4bbf2f..9c9fa3e 100644
--- a/server.js
+++ b/server.js
@@ -985,6 +985,8 @@ app.post("/api/desktop/multipart/abort", requireAuth, async (req, res) => {
   const { uploadId, key, bucket } = req.body;
   try { if (uploadId && key && bucket && s3Client) await s3Client.send(new AbortMultipartUploadCommand({ Bucket: bucket, Key: key, UploadId: uploadId })); } catch (_) {}
   desktopSessions.delete(uploadId);
+  res.json({ success: true });
+});
 
 // ==================== PARALLEL CHUNK UPLOAD (Option 4 — HTTP parallelism) ====================
 // Client splits files into 32 MB chunks and POSTs 6 concurrently.