diff --git a/datatypes/epc/surveys/pashub_rdsap_site_notes.py b/datatypes/epc/surveys/pashub_rdsap_site_notes.py
index 4423f077a..e6577c5d9 100644
--- a/datatypes/epc/surveys/pashub_rdsap_site_notes.py
+++ b/datatypes/epc/surveys/pashub_rdsap_site_notes.py
@@ -154,6 +154,7 @@ class ExtensionRoofSpace:
     rooms_in_roof: bool
     insulation_thickness_mm: Optional[int] = None
     insulation_thickness: Optional[str] = None
+    room_in_roof: Optional[RoomInRoofDetail] = None
 
 
 @dataclass