diff --git a/CHANGELOG.md b/CHANGELOG.md
index 678e7597f..348b382da 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
 - [#5842](https://github.com/influxdata/telegraf/pull/5842): Improve performance of wavefront serializer.
 - [#5863](https://github.com/influxdata/telegraf/pull/5863): Allow regex processor to append tag values.
 - [#5997](https://github.com/influxdata/telegraf/pull/5997): Add starttime field to phpfpm input.
+- [#5998](https://github.com/influxdata/telegraf/pull/5998): Add cluster name tag to elasticsearch indices.
 
 #### Bugfixes