diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75b09edc..6121d925 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,10 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
+## Changed
+
+- Project structure (linux and mission folder) is subsystem centric now.
+
 # [v1.40.0] 2023-03-24
 
 - eive-tmtc: v2.19.4