diff --git a/docs/crds/crds.adoc b/docs/crds/crds.adoc
index 152630a2..43c2d5ac 100644
--- a/docs/crds/crds.adoc
+++ b/docs/crds/crds.adoc
@@ -133,6 +133,8 @@ _Underlying type:_ _string_
 
 ClusterMode is the possible provisioning mode of a Cluster.
 
+Supported values: `shared`, `virtual`, `hcp`.
+
 
 
 _Appears In:_
diff --git a/docs/crds/crds.md b/docs/crds/crds.md
index 406286c8..08342601 100644
--- a/docs/crds/crds.md
+++ b/docs/crds/crds.md
@@ -102,6 +102,8 @@ _Underlying type:_ _string_
 
 ClusterMode is the possible provisioning mode of a Cluster.
 
+Supported values: `shared`, `virtual`, `hcp`.
+
 
 
 _Appears in:_
diff --git a/pkg/apis/k3k.io/v1beta1/types.go b/pkg/apis/k3k.io/v1beta1/types.go
index fcf5c81f..f21ad87a 100644
--- a/pkg/apis/k3k.io/v1beta1/types.go
+++ b/pkg/apis/k3k.io/v1beta1/types.go
@@ -412,6 +412,8 @@ type StorageClassSyncConfig struct {
 }
 
 // ClusterMode is the possible provisioning mode of a Cluster.
+//
+// Supported values: `shared`, `virtual`, `hcp`.
 type ClusterMode string
 
 const (