diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1dfeed76..c48e327f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -86,6 +86,8 @@ will consitute of a breaking change warranting a new major release:
 - Some smaller logic fixes in the TM store base class
 - Fixed usage of C `abs` instead of C++ `std::abs`, which results in MTQ commands not being
   scaled correctly between 1Am² and 0.2Am².
+- TCS Heater Handler: Always trigger mode event if a heater goes `OFF` or `ON`. This event might
+  soon replace the `HEATER_WENT_ON` and `HEATER_WENT_OFF` events.
 
 # [v2.0.5] 2023-05-11