diff --git a/lib/services.js b/lib/services.js
index d26d1eb1fb..b81e9b7a54 100644
--- a/lib/services.js
+++ b/lib/services.js
@@ -579,7 +579,7 @@ const services = {
         const multipartObjectMD = Object.assign({}, params.storedMetadata);
         multipartObjectMD.completeInProgress = true;
         metadata.putObjectMD(params.bucketName, longMPUIdentifier, multipartObjectMD,
-        {}, log, err => {
+        {preventConcurrentCompletion: true}, log, err => {
             if (err) {
                 log.error('error from metadata', { error: err });
                 return cb(err);