diff --git a/CHANGELOG.md b/CHANGELOG.md
index 916242b4..a5989043 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,10 @@ will consitute of a breaking change warranting a new major release:
   commanded, all heaters will be switched off and then no further heater
   commanding will be done.
 
+## Fixed
+
+- Heater states array in TCS controller was too small.
+
 # [v1.43.2] 2023-04-05
 
 ## Changed