diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46c8c554..57920507 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,8 @@ change warranting a new major release:
 
 ## Changed
 
+### ACS
+
 - Readded calibration matrices for MGM calibration.
 - Added calculation of satellite velocity vector from GPS position data
 - Added detumble mode using GYR values
@@ -46,6 +48,9 @@ change warranting a new major release:
   stored as the git SHA hash in `commonConfig.h`. This will be
   an empty string now for regular versions.
 - Bump FSFW for important fix in PUS mode service.
+
+### ACS
+
 - Bugfixes in 'SensorProcessing' where previously MGM values would be calibrated before being
   transformed in body RF. However, the calibration values are in the body RF. Also fixed the
   validity flag of 'mgmVecTotDerivative'.