diff --git a/app/vmselect/promql/aggr.go b/app/vmselect/promql/aggr.go
index ee9e6977e..dcd2c499a 100644
--- a/app/vmselect/promql/aggr.go
+++ b/app/vmselect/promql/aggr.go
@@ -27,7 +27,7 @@ var aggrFuncs = map[string]aggrFunc{
 	"topk":         newAggrFuncTopK(false),
 	"quantile":     aggrFuncQuantile,
 
-	// Extended PromQL funcs
+	// PromQL extension funcs
 	"median":         aggrFuncMedian,
 	"limitk":         aggrFuncLimitK,
 	"distinct":       newAggrFunc(aggrFuncDistinct),
diff --git a/docs/CaseStudies.md b/docs/CaseStudies.md
index ec46f5eb4..f96e44620 100644
--- a/docs/CaseStudies.md
+++ b/docs/CaseStudies.md
@@ -30,7 +30,7 @@ Numbers:
 * Enough head room/scaling capacity for future growth, up to 100M active time series.
 * Ability to split DB replicas per workload. Alert queries go to one replica, user queries go to another (speed for users, effective cache).
 
-> Optimizing for those points and our specific workload VictoriaMetrics proved to be the best option. As an icing on a cake we’ve got an [extended PromQL](https://github.com/VictoriaMetrics/VictoriaMetrics/wiki/ExtendedPromQL) - `default 0` and `histogram` are my favorite ones, for example. What we specially like is having a lot of tsdb params easily available via config options, that makes tsdb easy to tune for specific use case. Also worth noting is a great community in [Slack channel](http://slack.victoriametrics.com/) and of course maintainer support.
+> Optimizing for those points and our specific workload VictoriaMetrics proved to be the best option. As an icing on a cake we’ve got [PromQL extensions](https://github.com/VictoriaMetrics/VictoriaMetrics/wiki/ExtendedPromQL) - `default 0` and `histogram` are my favorite ones, for example. What we specially like is having a lot of tsdb params easily available via config options, that makes tsdb easy to tune for specific use case. Also worth noting is a great community in [Slack channel](http://slack.victoriametrics.com/) and of course maintainer support.
 
 Alex Ulstein, Head of Monitoring, Wix.com
 
diff --git a/docs/ExtendedPromQL.md b/docs/ExtendedPromQL.md
index e8fd95578..e9ac32fb6 100644
--- a/docs/ExtendedPromQL.md
+++ b/docs/ExtendedPromQL.md
@@ -1,4 +1,4 @@
-# Extended PromQL
+# PromQL extensions
 
 VictoriaMetrics supports [standard PromQL](https://prometheus.io/docs/prometheus/latest/querying/basics/)
 including [subqueries](https://prometheus.io/blog/2019/01/28/subquery-support/).
diff --git a/docs/Home.md b/docs/Home.md
index e7ed7d48f..bcb28f838 100644
--- a/docs/Home.md
+++ b/docs/Home.md
@@ -3,7 +3,7 @@
 * [Quick start](Quick-Start)
 * [`WITH` templates playground](https://play.victoriametrics.com/promql/expand-with-exprs)
 * [Grafana playground](http://play-grafana.victoriametrics.com:3000/d/4ome8yJmz/node-exporter-on-victoriametrics-demo)
-* [Extended PromQL](ExtendedPromQL)
+* [PromQL extensions](ExtendedPromQL)
 * [Single-node version](Single-server-VictoriaMetrics)
 * [FAQ](FAQ)
 * [Cluster version](Cluster-VictoriaMetrics)