diff --git a/addons/io_scene_swbf_msh/msh_model.py b/addons/io_scene_swbf_msh/msh_model.py
index d97918f..2c11aa6 100644
--- a/addons/io_scene_swbf_msh/msh_model.py
+++ b/addons/io_scene_swbf_msh/msh_model.py
@@ -61,7 +61,7 @@ class Model:
     model_type: ModelType = ModelType.NULL
     hidden: bool = True
 
-    transform: ModelTransform = ModelTransform()
+    transform: ModelTransform = field(default_factory=ModelTransform)
 
     geometry: List[GeometrySegment] = None
     collisionprimitive: CollisionPrimitive = None