diff --git a/zip-0244.rst b/zip-0244.rst
index 6122c475..eb75f369 100644
--- a/zip-0244.rst
+++ b/zip-0244.rst
@@ -608,6 +608,10 @@ a later protocol version. Such a third party SHOULD provide a value that can
 be used instead of the all-zeros terminator to permit the light client to
 perform validation of the parts of the structure it needs.
 
+Unlike the ``hashLightClientRoot`` change, the change to ``hashBlockCommitments``
+happens in the block that activates this ZIP.
+
+The block header byte format and version are not altered by this ZIP.
 
 ========================
 Reference implementation