diff --git a/CHANGELOG.md b/CHANGELOG.md
index 445569b38..357010f1e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@
 - [#4039](https://github.com/influxdata/telegraf/issues/4039): Fix potential "no fields" error writing to outputs.
 - [#4037](https://github.com/influxdata/telegraf/issues/4037): Fix uptime reporting in system input when ran inside docker.
 - [#3750](https://github.com/influxdata/telegraf/issues/3750): Fix mem input "cannot allocate memory" error on FreeBSD based systems.
+- [#4056](https://github.com/influxdata/telegraf/pull/4056): Fix duplicate tags when overriding an existing tag.
 
 ## v1.6 [2018-04-16]