diff --git a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/BUILD b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/BUILD
index f2aafb0de41..1caa89ef5fd 100644
--- a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/BUILD
+++ b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/BUILD
@@ -18,6 +18,7 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/registry/generic:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/registry/generic/registry:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/registry/rest:go_default_library",
     ],
 )
 
diff --git a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go
index e5c0388874a..54207b62423 100644
--- a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go
+++ b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go
@@ -20,6 +20,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apiserver/pkg/registry/generic"
 	genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
+	"k8s.io/apiserver/pkg/registry/rest"
 	"k8s.io/kubernetes/pkg/apis/admissionregistration"
 	"k8s.io/kubernetes/pkg/printers"
 	printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
@@ -54,3 +55,11 @@ func NewREST(optsGetter generic.RESTOptionsGetter) (*REST, error) {
 	}
 	return &REST{store}, nil
 }
+
+// Implement CategoriesProvider
+var _ rest.CategoriesProvider = &REST{}
+
+// Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
+func (r *REST) Categories() []string {
+	return []string{"api-extensions"}
+}
diff --git a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/BUILD b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/BUILD
index 2c394963c90..c3facddc56a 100644
--- a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/BUILD
+++ b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/BUILD
@@ -18,6 +18,7 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/registry/generic:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/registry/generic/registry:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/registry/rest:go_default_library",
     ],
 )
 
diff --git a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go
index 4c0cb761800..507c0d9e758 100644
--- a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go
+++ b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go
@@ -20,6 +20,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apiserver/pkg/registry/generic"
 	genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
+	"k8s.io/apiserver/pkg/registry/rest"
 	"k8s.io/kubernetes/pkg/apis/admissionregistration"
 	"k8s.io/kubernetes/pkg/printers"
 	printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
@@ -54,3 +55,11 @@ func NewREST(optsGetter generic.RESTOptionsGetter) (*REST, error) {
 	}
 	return &REST{store}, nil
 }
+
+// Implement CategoriesProvider
+var _ rest.CategoriesProvider = &REST{}
+
+// Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
+func (r *REST) Categories() []string {
+	return []string{"api-extensions"}
+}
diff --git a/staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresourcedefinition/etcd.go b/staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresourcedefinition/etcd.go
index aa1f264297f..be857ecd2fe 100644
--- a/staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresourcedefinition/etcd.go
+++ b/staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresourcedefinition/etcd.go
@@ -69,6 +69,14 @@ func (r *REST) ShortNames() []string {
 	return []string{"crd", "crds"}
 }
 
+// Implement CategoriesProvider
+var _ rest.CategoriesProvider = &REST{}
+
+// Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
+func (r *REST) Categories() []string {
+	return []string{"api-extensions"}
+}
+
 // Delete adds the CRD finalizer to the list
 func (r *REST) Delete(ctx context.Context, name string, deleteValidation rest.ValidateObjectFunc, options *metav1.DeleteOptions) (runtime.Object, bool, error) {
 	obj, err := r.Get(ctx, name, &metav1.GetOptions{})
diff --git a/staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice/etcd/etcd.go b/staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice/etcd/etcd.go
index 7fefca5ce49..4fe241a5a3a 100644
--- a/staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice/etcd/etcd.go
+++ b/staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice/etcd/etcd.go
@@ -59,6 +59,14 @@ func NewREST(scheme *runtime.Scheme, optsGetter generic.RESTOptionsGetter) *REST
 	return &REST{store}
 }
 
+// Implement CategoriesProvider
+var _ rest.CategoriesProvider = &REST{}
+
+// Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
+func (c *REST) Categories() []string {
+	return []string{"api-extensions"}
+}
+
 var swaggerMetadataDescriptions = metav1.ObjectMeta{}.SwaggerDoc()
 
 // ConvertToTable implements the TableConvertor interface for REST.