diff --git a/dulwich/cloud/gcs.py b/dulwich/cloud/gcs.py
index fbe49c58c..11f9d6893 100644
--- a/dulwich/cloud/gcs.py
+++ b/dulwich/cloud/gcs.py
@@ -29,6 +29,9 @@
 from ..pack import PackData, Pack, load_pack_index_file
 
 
+# TODO(jelmer): For performance, read ranges?
+
+
 class GcsObjectStore(BucketBasedObjectStore):
 
     def __init__(self, bucket, subpath=''):