diff --git a/src/ifcopenshell-python/ifcopenshell/file.py b/src/ifcopenshell-python/ifcopenshell/file.py
index d7d240fa6a..2a00b284b3 100644
--- a/src/ifcopenshell-python/ifcopenshell/file.py
+++ b/src/ifcopenshell-python/ifcopenshell/file.py
@@ -267,6 +267,7 @@ class file:
     """
 
     wrapped_data: ifcopenshell_wrapper.file
+    header: ifcopenshell_wrapper.IfcSpfHeader
     units: dict[str, entity_instance] = {}
     history_size: int = 64
     history: list[Transaction]