diff --git a/CHANGES.rst b/CHANGES.rst
index 7f8a9f2e3..a3527de7d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,6 +5,9 @@ Changelog (Pillow)
 8.4.0 (unreleased)
 ------------------
 
+- Deprecate ImagePalette size parameter #5641
+  [radarhere, hugovk]
+
 - Prefer command line tools SDK on macOS #5624
   [radarhere]