diff --git a/src/blenderbim/blenderbim/bim/module/pset/operator.py b/src/blenderbim/blenderbim/bim/module/pset/operator.py
index 55d35e6944..ba06c8283b 100644
--- a/src/blenderbim/blenderbim/bim/module/pset/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/pset/operator.py
@@ -447,7 +447,7 @@ class CalculateAllQuantities(bpy.types.Operator, tool.Ifc.Operator):
         return context.active_object
 
     def _execute(self, context):
-        QtoCore.calculate_all_qtos(tool.Ifc, tool.Qto, selected_objects = context.selected_objects)
+        QtoCore.calculate_all_qtos(tool.Qto, selected_objects = [context.active_object])
 
 
 class CopyPropertyToSelection(bpy.types.Operator, Operator):