diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6ca48e0b..7f5b0975a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -96,6 +96,7 @@
 - [#6235](https://github.com/influxdata/telegraf/issues/6235): Fix finder inconsistencies in vsphere input.
 - [#6138](https://github.com/influxdata/telegraf/issues/6138): Fix parsing multiple metrics on the first line of tailed file.
 - [#2526](https://github.com/influxdata/telegraf/issues/2526): Send TERM to exec processes before sending KILL signal.
+- [#5326](https://github.com/influxdata/telegraf/issues/5326): Query oplog only when connected to a replica set.
 
 ## v1.11.5 [unreleased]