diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 9b1381ce..cb988d42 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -33,6 +33,10 @@ Upcoming Release
 
 * Split configuration to enable SMR and SMR CC.
 
+* The configuration setting for country focus weights when clustering the
+  network has been moved from ``focus_weights:`` to ``clustering:
+  focus_weights:``. Backwards compatibility to old config files is maintained.
+
 * The ``mock_snakemake`` function can now be used with a Snakefile from a different directory using the new ``root_dir`` argument.