diff --git a/cmd/fs-v1-multipart.go b/cmd/fs-v1-multipart.go
index 0e836892e..479e748c7 100644
--- a/cmd/fs-v1-multipart.go
+++ b/cmd/fs-v1-multipart.go
@@ -517,7 +517,7 @@ func (fs *FSObjects) ListObjectParts(ctx context.Context, bucket, object, upload
 		}
 	}
 
-	rc, _, err := fsOpenFile(ctx, pathJoin(uploadIDDir, fs.metaJSONFile), 0o666)
+	rc, _, err := fsOpenFile(ctx, pathJoin(uploadIDDir, fs.metaJSONFile), 0)
 	if err != nil {
 		if err == errFileNotFound || err == errFileAccessDenied {
 			return result, InvalidUploadID{Bucket: bucket, Object: object, UploadID: uploadID}
@@ -534,7 +534,7 @@ func (fs *FSObjects) ListObjectParts(ctx context.Context, bucket, object, upload
 	var fsMeta fsMetaV1
 	json := jsoniter.ConfigCompatibleWithStandardLibrary
 	if err = json.Unmarshal(fsMetaBytes, &fsMeta); err != nil {
-		return result, err
+		return result, toObjectErr(fmt.Errorf("unable to parse %s: error %w", pathJoin(uploadIDDir, fs.metaJSONFile), err), bucket, object)
 	}
 
 	result.UserDefined = fsMeta.Meta
diff --git a/cmd/fs-v1.go b/cmd/fs-v1.go
index a658b7310..8aa5d29a9 100644
--- a/cmd/fs-v1.go
+++ b/cmd/fs-v1.go
@@ -867,7 +867,7 @@ func (fs *FSObjects) getObjectInfoNoFSLock(ctx context.Context, bucket, object s
 	// Read `fs.json` to perhaps contend with
 	// parallel Put() operations.
 
-	rc, _, err := fsOpenFile(ctx, fsMetaPath, 0o666)
+	rc, _, err := fsOpenFile(ctx, fsMetaPath, 0)
 	if err == nil {
 		fsMetaBuf, rerr := ioutil.ReadAll(rc)
 		rc.Close()