diff --git a/odoo-stubs/api.pyi b/odoo-stubs/api.pyi
index ae1bb11..9e3c674 100644
--- a/odoo-stubs/api.pyi
+++ b/odoo-stubs/api.pyi
@@ -103,7 +103,7 @@ class Transaction:
     protected: StackMap[Field, set[int]]
     tocompute: defaultdict[Field, set[int]]
     towrite: defaultdict[str, dict[int, dict[str, Any]]]
-    def __init__(self, registry: Registry): ...
+    def __init__(self, registry: Registry) -> None: ...
     def flush(self) -> None: ...
     def clear(self) -> None: ...
     def reset(self) -> None: ...