diff --git a/l3experimental/CHANGELOG.md b/l3experimental/CHANGELOG.md
index f9604428a3..25e0d16ff6 100644
--- a/l3experimental/CHANGELOG.md
+++ b/l3experimental/CHANGELOG.md
@@ -7,6 +7,9 @@ this project uses date-based 'snapshot' version identifiers.
 
 ## [Unreleased]
 
+### Changed
+- Track message changes in `l3kernel`
+
 ## [2021-08-04]
 
 ### Added
diff --git a/l3kernel/CHANGELOG.md b/l3kernel/CHANGELOG.md
index 3d0ce38c78..e467459ec2 100644
--- a/l3kernel/CHANGELOG.md
+++ b/l3kernel/CHANGELOG.md
@@ -9,6 +9,7 @@ this project uses date-based 'snapshot' version identifiers.
 
 ### Changed
 - Formatting of expandable errors (issue #931)
+- Internal code for kernel messages
 
 ## [2021-07-12]
 
diff --git a/l3packages/CHANGELOG.md b/l3packages/CHANGELOG.md
index 8b9928d648..20e09a01ed 100644
--- a/l3packages/CHANGELOG.md
+++ b/l3packages/CHANGELOG.md
@@ -7,6 +7,9 @@ this project uses date-based 'snapshot' version identifiers.
 
 ## [Unreleased]
 
+### Changed
+- Track message changes in `l3kernel`
+
 ## [2021-08-04]
 
 ### Changed