diff --git a/CHANGELOG.md b/CHANGELOG.md
index b375c437e..32cdd8316 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@
 - [#3624](https://github.com/influxdata/telegraf/pull/3624): Fix name error in jolokia2_agent sample config.
 - [#3625](https://github.com/influxdata/telegraf/pull/3625): Fix DC/OS login expiration time.
 - [#3593](https://github.com/influxdata/telegraf/pull/3593): Set Content-Type charset in influxdb output and allow it be overridden.
+- [#3594](https://github.com/influxdata/telegraf/pull/3594): Document permissions setup for postfix input.
 
 ## v1.5 [2017-12-14]