diff --git a/CHANGELOG.md b/CHANGELOG.md
index 16e7e04..1ca80c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Added `std::error::Error` implementation for all error enumerations if the `std` feature
   is enabled.
+- CUC timestamp implementation as specified in CCSDS 301.0-B-4 section 3.2.
 - ACII timestamps as specified in CCSDS 301.0-B-4 section 3.5.
 - Added MSRV in `Cargo.toml` with the `rust-version` field set to Rust 1.60.
 - `serde` `Serialize` and `Deserialize` added to all types.