diff --git a/CHANGELOG.md b/CHANGELOG.md
index afb563681613..0cafe1d8e448 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -79,6 +79,8 @@ Main (unreleased)
 
 - Bump github.com/IBM/sarama from v1.41.2 to v1.42.1
 
+- Attatch unique Agent ID header to remote-write requests. (@captncraig)
+
 v0.38.1 (2023-11-30)
 --------------------