diff --git a/CHANGELOG.md b/CHANGELOG.md
index a444b19ca9d57fba218d756212151181a0e2e2ad..b85e95195291087c8816225b8ecde5efbc14d3ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ in their config file.
 - [#2006](https://github.com/influxdata/telegraf/pull/2006): Added response_timeout property to prometheus input plugin.
 - [#1763](https://github.com/influxdata/telegraf/issues/1763): Pulling github.com/lxn/win's pdh wrapper into telegraf.
 - [#1898](https://github.com/influxdata/telegraf/issues/1898): Support negative statsd counters.
+- [#1921](https://github.com/influxdata/telegraf/issues/1921): Elasticsearch cluster stats support.
 
 ### Bugfixes