diff --git a/CHANGELOG.md b/CHANGELOG.md
index d66e4dd3a..eadbed925 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,6 +47,8 @@ based on _prefix_ in addition to globs. This means that a filter like
   - cassandra: `host -> cassandra_host`
   - disque: `host -> disque_host`
   - rethinkdb: `host -> rethinkdb_host`
+  
+- **Breaking Change**: The `win_perf_counters` input has been changed to sanitize field names, replacing `/Sec` and `/sec` with `_persec`, as well as spaces with underscores. This is needed because Graphite doesn't like slashes and spaces, and was failing to accept metrics that had them. The `/[sS]ec` -> `_persec` is just to make things clearer and uniform.
 
 ### Features
 
@@ -65,6 +67,7 @@ based on _prefix_ in addition to globs. This means that a filter like
 - [#967](https://github.com/influxdata/telegraf/issues/967): Buffer logging improvements.
 - [#1107](https://github.com/influxdata/telegraf/issues/1107): Support lustre2 job stats. Thanks @hanleyja!
 - [#1110](https://github.com/influxdata/telegraf/pull/1110): Sanitize * to - in graphite serializer. Thanks @goodeggs!
+- [#1118] (https://github.com/influxdata/telegraf/pull/1118): Sanitize Counter names for `win_perf_counters` input.
 
 ### Bugfixes