diff --git a/pkg/apis/admissionregistration/types.go b/pkg/apis/admissionregistration/types.go
index 037c0757709..be760c44da8 100644
--- a/pkg/apis/admissionregistration/types.go
+++ b/pkg/apis/admissionregistration/types.go
@@ -21,6 +21,7 @@ import (
 )
 
 // +genclient=true
+// +nonNamespaced=true
 
 // InitializerConfiguration describes the configuration of initializers.
 type InitializerConfiguration struct {
@@ -114,6 +115,7 @@ const (
 )
 
 // +genclient=true
+// +nonNamespaced=true
 
 // ExternalAdmissionHookConfiguration describes the configuration of initializers.
 type ExternalAdmissionHookConfiguration struct {
diff --git a/pkg/apis/admissionregistration/v1alpha1/types.go b/pkg/apis/admissionregistration/v1alpha1/types.go
index 67a76dff981..f35d54a81ad 100644
--- a/pkg/apis/admissionregistration/v1alpha1/types.go
+++ b/pkg/apis/admissionregistration/v1alpha1/types.go
@@ -21,6 +21,7 @@ import (
 )
 
 // +genclient=true
+// +nonNamespaced=true
 
 // InitializerConfiguration describes the configuration of initializers.
 type InitializerConfiguration struct {
@@ -116,6 +117,7 @@ const (
 )
 
 // +genclient=true
+// +nonNamespaced=true
 
 // ExternalAdmissionHookConfiguration describes the configuration of initializers.
 type ExternalAdmissionHookConfiguration struct {