diff --git a/cmd/kube-proxy/app/options/options.go b/cmd/kube-proxy/app/options/options.go
index 40d89e3ea9f..a7fa9439f67 100644
--- a/cmd/kube-proxy/app/options/options.go
+++ b/cmd/kube-proxy/app/options/options.go
@@ -50,8 +50,10 @@ type ProxyServerConfig struct {
 }
 
 func NewProxyConfig() *ProxyServerConfig {
+	versioned := &v1alpha1.KubeProxyConfiguration{}
+	api.Scheme.Default(versioned)
 	cfg := componentconfig.KubeProxyConfiguration{}
-	api.Scheme.Convert(&v1alpha1.KubeProxyConfiguration{}, &cfg, nil)
+	api.Scheme.Convert(versioned, &cfg, nil)
 	return &ProxyServerConfig{
 		KubeProxyConfiguration: cfg,
 		ContentType:            "application/vnd.kubernetes.protobuf",
diff --git a/cmd/kubelet/app/options/options.go b/cmd/kubelet/app/options/options.go
index 85ca9771ff9..282cf24d071 100644
--- a/cmd/kubelet/app/options/options.go
+++ b/cmd/kubelet/app/options/options.go
@@ -64,8 +64,10 @@ type KubeletServer struct {
 
 // NewKubeletServer will create a new KubeletServer with default values.
 func NewKubeletServer() *KubeletServer {
+	versioned := &v1alpha1.KubeletConfiguration{}
+	api.Scheme.Default(versioned)
 	config := componentconfig.KubeletConfiguration{}
-	api.Scheme.Convert(&v1alpha1.KubeletConfiguration{}, &config, nil)
+	api.Scheme.Convert(versioned, &config, nil)
 	return &KubeletServer{
 		KubeConfig:           flag.NewStringFlag("/var/lib/kubelet/kubeconfig"),
 		RequireKubeConfig:    false, // in 1.5, default to true
diff --git a/cmd/kubelet/app/server.go b/cmd/kubelet/app/server.go
index 05f1279bc15..0a696b25c1f 100644
--- a/cmd/kubelet/app/server.go
+++ b/cmd/kubelet/app/server.go
@@ -246,6 +246,7 @@ func initKubeletConfigSync(s *options.KubeletServer) (*componentconfig.KubeletCo
 		if err != nil {
 			return nil, err
 		}
+		api.Scheme.Default(&extKC)
 		kc := componentconfig.KubeletConfiguration{}
 		err = api.Scheme.Convert(&extKC, &kc, nil)
 		if err != nil {
diff --git a/pkg/kubemark/hollow_kubelet.go b/pkg/kubemark/hollow_kubelet.go
index 672f5685509..30feba4cc91 100644
--- a/pkg/kubemark/hollow_kubelet.go
+++ b/pkg/kubemark/hollow_kubelet.go
@@ -103,6 +103,7 @@ func GetHollowKubeletConfig(
 	// Do the external -> internal conversion to make sure that defaults
 	// are set for fields not overridden in NewHollowKubelet.
 	tmp := &v1alpha1.KubeletConfiguration{}
+	api.Scheme.Default(tmp)
 	c := &componentconfig.KubeletConfiguration{}
 	api.Scheme.Convert(tmp, c, nil)
 
diff --git a/plugin/cmd/kube-scheduler/app/options/options.go b/plugin/cmd/kube-scheduler/app/options/options.go
index 5a352cf61d0..43a38ca5528 100644
--- a/plugin/cmd/kube-scheduler/app/options/options.go
+++ b/plugin/cmd/kube-scheduler/app/options/options.go
@@ -42,8 +42,10 @@ type SchedulerServer struct {
 
 // NewSchedulerServer creates a new SchedulerServer with default parameters
 func NewSchedulerServer() *SchedulerServer {
+	versioned := &v1alpha1.KubeSchedulerConfiguration{}
+	api.Scheme.Default(versioned)
 	cfg := componentconfig.KubeSchedulerConfiguration{}
-	api.Scheme.Convert(&v1alpha1.KubeSchedulerConfiguration{}, &cfg, nil)
+	api.Scheme.Convert(versioned, &cfg, nil)
 	cfg.LeaderElection.LeaderElect = true
 	s := SchedulerServer{
 		KubeSchedulerConfiguration: cfg,
diff --git a/test/e2e_node/dynamic_kubelet_configuration_test.go b/test/e2e_node/dynamic_kubelet_configuration_test.go
index 036d44755b0..674022b1fd5 100644
--- a/test/e2e_node/dynamic_kubelet_configuration_test.go
+++ b/test/e2e_node/dynamic_kubelet_configuration_test.go
@@ -142,6 +142,8 @@ func decodeConfigz(resp *http.Response) (*componentconfig.KubeletConfiguration,
 		return nil, err
 	}
 
+	api.Scheme.Default(&configz.ComponentConfig)
+
 	err = api.Scheme.Convert(&configz.ComponentConfig, &kubeCfg, nil)
 	if err != nil {
 		return nil, err