diff --git a/docs/Cluster-VictoriaMetrics.md b/docs/Cluster-VictoriaMetrics.md
index 3eb9a5edaa..7c9f81ba15 100644
--- a/docs/Cluster-VictoriaMetrics.md
+++ b/docs/Cluster-VictoriaMetrics.md
@@ -173,6 +173,8 @@ or [an alternative dashboard for VictoriaMetrics cluster](https://grafana.com/gr
      - `prometheus` and `prometheus/api/v1/write` - for inserting data with [Prometheus remote write API](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote_write)
      - `influx/write` and `influx/api/v2/write` - for inserting data with [Influx line protocol](https://docs.influxdata.com/influxdb/v1.7/write_protocols/line_protocol_tutorial/).
      - `opentsdb/api/put` - for accepting [OpenTSDB HTTP /api/put requests](http://opentsdb.net/docs/build/html/api_http/put.html).
+       This handler is disabled by default. It is exposed on a distinct TCP address set via `-opentsdbHTTPListenAddr` command-line flag.
+       See [these docs](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/README.md#sending-opentsdb-data-via-http-apiput-requests) for details.
      - `prometheus/api/v1/import` - for importing data obtained via `api/v1/export` on `vmselect` (see below).
      - `prometheus/api/v1/import/csv` - for importing arbitrary CSV data. See [these docs](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/README.md#how-to-import-csv-data) for details.