diff --git a/cmd/core/main.go b/cmd/core/main.go
index 72cf2a8f..5a52a167 100644
--- a/cmd/core/main.go
+++ b/cmd/core/main.go
@@ -35,6 +35,7 @@ import (
 	"k8s.io/apimachinery/pkg/selection"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
+	"k8s.io/kube-aggregator/pkg/apis/apiregistration"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/cache"
 	"sigs.k8s.io/controller-runtime/pkg/cluster"
@@ -65,6 +66,7 @@ func init() {
 	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
 	utilruntime.Must(apiextensionsv1.AddToScheme(scheme))
 	utilruntime.Must(rukpakv1alpha1.AddToScheme(scheme))
+	utilruntime.Must(apiregistration.AddToScheme(scheme))
 	//+kubebuilder:scaffold:scheme
 }