diff --git a/CHANGES b/CHANGES
index 5450e95507f..b35f126d788 100644
--- a/CHANGES
+++ b/CHANGES
@@ -13,6 +13,9 @@ Deprecated
 Features added
 --------------
 
+* #9815: html theme: Wrap sidebar components in div to allow customizing their
+  layout via CSS
+
 Bugs fixed
 ----------