diff --git a/odmantic/model.py b/odmantic/model.py
index 08308f29..d2ca2384 100644
--- a/odmantic/model.py
+++ b/odmantic/model.py
@@ -539,8 +539,8 @@ class _BaseODMModel(pydantic.BaseModel, metaclass=ABCMeta):
     __slots__ = ("__fields_modified__",)
 
     def __init__(self, **data: Any):
-        super().__init__(**data)
         object.__setattr__(self, "__fields_modified__", set(self.__odm_fields__.keys()))
+        super().__init__(**data)
 
     @classmethod
     # TODO: rename to model_validate