diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26b373dc99..0297b03899 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+- Writing of multistage stats during optimization #688 
+
 ### Fixed
 - Fix write_status with UCommit = WriteShadowPrices = 1 (#645)
 - Add check when capital recovery period is zero and investment costs are