diff --git a/CHANGELOG.md b/CHANGELOG.md
index 450b4f16..795c45ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Math equation `max(x, y)` didn't work anymore [#721](https://github.com/smarty-php/smarty/issues/721)
+
 ## [3.1.44] - 2022-01-18
 
 ### Fixed