diff --git a/engine/asset/include/asset_types.hpp b/engine/asset/include/asset_types.hpp
index 0edff70..70e2401 100644
--- a/engine/asset/include/asset_types.hpp
+++ b/engine/asset/include/asset_types.hpp
@@ -32,7 +32,6 @@ struct MaterialProperty {
         name = "";
         type = DataType::Vector3;
     }
-    MaterialProperty(std::string n, DataType t) : name(n), type(t) {}
 
     prism::float3 value;
     AssetPtr<Texture> value_tex;
@@ -62,7 +61,7 @@ struct BoneVertexData {
 };
 
 struct Bone {
-    int index = 0;
+    size_t index = 0;
 
     std::string name;
     Matrix4x4 local_transform, final_transform;