diff --git a/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py b/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py
index 40d0660ee1..8287a717fa 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py
@@ -161,7 +161,7 @@ def assign_object(
                 "OwnerHistory": ifcopenshell.api.owner.create_owner_history(file),
                 "RelatedObjects": list(products_set),
                 "RelatingObject": relating_object,
-            }
+            },
         )
 
     # localize placement relative to a new aggregate for affected products