diff --git a/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py b/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py
index 160d3a4254..cb3827332c 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py
@@ -201,7 +201,7 @@ class Usecase:
         """
         value = self.settings["properties"][prop.Name]
         unit, value = self.unpack_unit_value(value)
-        if isinstance(value, list):
+        if isinstance(value, (tuple, list)):
             sel_vals = []
             for val in value:
                 primary_measure_type = prop.EnumerationReference.EnumerationValues[