diff --git a/docs/usage/custom-resources.md b/docs/usage/custom-resources.md
index 09b730ab6..5508d7979 100644
--- a/docs/usage/custom-resources.md
+++ b/docs/usage/custom-resources.md
@@ -73,6 +73,10 @@ spec:
             major: {op: Exists}
 ```
 
+NodeFeatureGroup API is an alpha feature and disabled by default in NFD version
+{{ site.version }}. For more details and examples see the
+[customization guide](customization-guide.md#nodefeaturegroup-custom-resource).
+
 ## NodeFeatureRule
 
 NodeFeatureRule is an NFD-specific custom resource that is designed for
diff --git a/docs/usage/customization-guide.md b/docs/usage/customization-guide.md
index f4be9a701..f8379bc05 100644
--- a/docs/usage/customization-guide.md
+++ b/docs/usage/customization-guide.md
@@ -189,6 +189,11 @@ to specify taints in the NodeFeatureRule object.
 
 ## NodeFeatureGroup custom resource
 
+NodeFeatureGroup API is an alpha feature and disabled by default in NFD version
+{{ site.version }}. Use the
+[NodeFeatureAPI](../reference/feature-gates.md#nodefeaturegroupapi) feature
+gate to enable it.
+
 `NodeFeatureGroup` objects provide a way to create node groups that share the
 same set of features. The `NodeFeatureGroup` object spec consists of a list of
 `NodeFeatureRule` that follow the same format as the `NodeFeatureRule`,