diff --git a/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs
new file mode 100644
index 000000000..1a977ccae
--- /dev/null
+++ b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs
@@ -0,0 +1,9 @@
+namespace UniGLTF
+{
+    public enum SerializerTypes
+    {
+        JsonSerializable, // manual
+        UniJSON, // reflection
+        Generated, // generated, experimental for mobile
+    }
+}
diff --git a/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs.meta b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs.meta
new file mode 100644
index 000000000..6ff72b756
--- /dev/null
+++ b/Assets/VRM/UniGLTF/Scripts/Format/SerializerTypes.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 2b17414c7f3ba564083dbcebda778633
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: