diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82b6443c..d0c9d904 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ list yields a list of all related PRs for each release.
 
 ## Changed
 
+- The ACS Controller Gyro Sets (raw and processed) and the MEKF dataset are diagnostics now.
 - Bumped FSFW for Service 11 improvement which includes size and CRC check for contained TC
 - Syrlinks module now always included for both EM and FM