diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6b03400b..90bbd777 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed inaccuracy in cosine implementation caused by accidentally multiplying correction term by zero.
+
 ## [0.17.1] - 2023/10/05
 
 ### Fixed