diff --git a/CHANGELOG.md b/CHANGELOG.md
index d02acae9a..996fe1b88 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -57,6 +57,7 @@
 - [#3305](https://github.com/influxdata/telegraf/pull/3305): Add modification_time field to filestat input plugin.
 - [#2019](https://github.com/influxdata/telegraf/pull/2019): Add Solr input plugin.
 - [#3210](https://github.com/influxdata/telegraf/pull/3210): Add CrateDB output plugin.
+- [#3459](https://github.com/influxdata/telegraf/pull/3459): Add systemd unit pid and cgroup matching to procstat.
 
 ### Bugfixes
 
diff --git a/plugins/inputs/procstat/procstat.go b/plugins/inputs/procstat/procstat.go
index 5df7d05e4..ca303d49f 100644
--- a/plugins/inputs/procstat/procstat.go
+++ b/plugins/inputs/procstat/procstat.go
@@ -49,8 +49,8 @@ var sampleConfig = `
   # user = "nginx"
   ## Systemd unit name
   # systemd_unit = "nginx.service"
-	## CGroup name or path
-	# cgroup = "systemd/system.slice/nginx.service"
+  ## CGroup name or path
+  # cgroup = "systemd/system.slice/nginx.service"
 
   ## override for process_name
   ## This is optional; default is sourced from /proc/<pid>/status