diff --git a/kms/platform/kms_darwin.go b/kms/platform/kms_darwin.go
index d1cd8cac..00e75c0d 100644
--- a/kms/platform/kms_darwin.go
+++ b/kms/platform/kms_darwin.go
@@ -25,7 +25,7 @@ func newKMS(ctx context.Context, opts apiv1.Options) (*KMS, error) {
 		return newTPMKMS(ctx, opts)
 	case apiv1.SoftKMS:
 		return newSoftKMS(ctx, opts)
-	case apiv1.DefaultKMS, apiv1.MacKMS:
+	case apiv1.PlatformKMS, apiv1.DefaultKMS, apiv1.MacKMS:
 		return newMacKMS(ctx, opts)
 	default:
 		return nil, fmt.Errorf("failed parsing options: unsupported backend %q", backend)
diff --git a/kms/platform/kms_other.go b/kms/platform/kms_other.go
index 60fc56ea..d7233473 100644
--- a/kms/platform/kms_other.go
+++ b/kms/platform/kms_other.go
@@ -18,7 +18,7 @@ func newKMS(ctx context.Context, opts apiv1.Options) (*KMS, error) {
 	switch backend {
 	case apiv1.SoftKMS:
 		return newSoftKMS(ctx, opts)
-	case apiv1.DefaultKMS, apiv1.TPMKMS:
+	case apiv1.PlatformKMS, apiv1.DefaultKMS, apiv1.TPMKMS:
 		return newTPMKMS(ctx, opts)
 	default:
 		return nil, fmt.Errorf("failed parsing options: unsupported backend %q", backend)
diff --git a/kms/platform/kms_test.go b/kms/platform/kms_test.go
index ba8ba2ab..f08bc662 100644
--- a/kms/platform/kms_test.go
+++ b/kms/platform/kms_test.go
@@ -329,6 +329,14 @@ func TestNew(t *testing.T) {
 			shouldSkipNow(t, platformKMS)
 			assert.Equal(t, platformKMS.Type(), k.Type())
 		}, assert.NoError},
+		{"ok platformKMS type", args{t.Context(), apiv1.Options{Type: apiv1.PlatformKMS}}, func(t *testing.T, k *KMS) {
+			shouldSkipNow(t, platformKMS)
+			assert.Equal(t, platformKMS.Type(), k.Type())
+		}, assert.NoError},
+		{"ok backend type", args{t.Context(), apiv1.Options{Type: platformKMS.Type()}}, func(t *testing.T, k *KMS) {
+			shouldSkipNow(t, platformKMS)
+			assert.Equal(t, platformKMS.Type(), k.Type())
+		}, assert.NoError},
 		{"ok softkms uri", args{t.Context(), apiv1.Options{URI: "kms:backend=softkms"}}, func(t *testing.T, k *KMS) {
 			assert.Equal(t, apiv1.SoftKMS, k.Type())
 		}, assert.NoError},
@@ -354,6 +362,14 @@ func TestNew(t *testing.T) {
 	}
 }
 
+func TestLoadKeyManagerNewFunc(t *testing.T) {
+	fn, ok := apiv1.LoadKeyManagerNewFunc(apiv1.PlatformKMS)
+	require.True(t, ok)
+	km, err := fn(t.Context(), apiv1.Options{})
+	require.NoError(t, err)
+	assert.IsType(t, &KMS{}, km)
+}
+
 func TestKMS_Type(t *testing.T) {
 	softKMS := mustKMS(t, "kms:backend=softkms")
 	assert.Equal(t, apiv1.SoftKMS, softKMS.Type())
diff --git a/kms/platform/kms_windows.go b/kms/platform/kms_windows.go
index af0dede4..662dff29 100644
--- a/kms/platform/kms_windows.go
+++ b/kms/platform/kms_windows.go
@@ -26,7 +26,7 @@ func newKMS(ctx context.Context, opts apiv1.Options) (*KMS, error) {
 		return newCAPIKMS(ctx, opts)
 	case apiv1.SoftKMS:
 		return newSoftKMS(ctx, opts)
-	case apiv1.DefaultKMS, apiv1.TPMKMS:
+	case apiv1.PlatformKMS, apiv1.DefaultKMS, apiv1.TPMKMS:
 		// Add enable-cng=true if necessary
 		if opts.URI, err = withEnableCNG(opts.URI); err != nil {
 			return nil, err