diff --git a/RELEASE_NOTES.rst b/RELEASE_NOTES.rst
index c9b30a43e..f00a36db6 100644
--- a/RELEASE_NOTES.rst
+++ b/RELEASE_NOTES.rst
@@ -4,6 +4,7 @@ Next release
 All changes
 -----------
 
+- Improve tutorial Westeros baseline for correct lifetime, units, and vintage-activity years (:pull:`815`).
 - Update tutorial Westeros multinode to include code-based hints for in-depth questions (:pull:`798`).
 - :func:`.make_df` can now create partly-filled :class:`DataFrames <pandas.DataFrame>` for indexed sets; not only parameters (:pull:`784`).
 - New function :func:`.util.copy_model` that exposes the behaviour of the :program:`message-ix copy-model` CLI command to other Python code (:pull:`784`).