diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82025834cbdb67400445db6804edd85090bb82c4..449398f23210c1e4f7468696d246ec54c08e48c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Removed duplicated entries from generated `.dep` files
 
 ### Other changes
+* removed `e3.cfg`, `ess-env.conf` and `DEFINES_REQUIRE` files and associated codes in `RULES_REQUIRE`, `setE3Env.bash` and `.gitignore`. 
 * removed legacy code from setE3Env.bash
 * Removed usage of `env.sh` - now there is a check only for seeing if the environment variable `$IOCNAME` is set
 * Fix typos in `iocsh_functions.bash` comments