diff --git a/docs/sources/panels/transformations/types-options.md b/docs/sources/panels/transformations/types-options.md
index 081b169c846..b6b7fc84bdf 100644
--- a/docs/sources/panels/transformations/types-options.md
+++ b/docs/sources/panels/transformations/types-options.md
@@ -402,6 +402,8 @@ Conditions that are invalid or incompletely configured are ignored.
 
 ## Rename by regex
 
+> **Note:** This transformation is only available in Grafana 7.4+.
+
 Use this transformation to rename parts of the query results using a regular expression and replacement pattern.
 
 You can specify a regular expression, which is only applied to matches, along with a replacement pattern that support back references. For example, let's imagine you're visualizing CPU usage per host and you want to remove the domain name. You could set the regex to `([^\.]+)\..+` and the replacement pattern to `$1`, `web-01.example.com` would become `web-01`.