diff --git a/product/ERP5/Document/CategoryMovementGroup.py b/product/ERP5/Document/CategoryMovementGroup.py
index 0bdfaf71e71944f3ec75415483039a61176a1e93..3531abfb12bc33fcf90cc099400781e5c2698189 100644
--- a/product/ERP5/Document/CategoryMovementGroup.py
+++ b/product/ERP5/Document/CategoryMovementGroup.py
@@ -42,7 +42,7 @@ class CategoryMovementGroup(PropertyMovementGroup):
     property_dict = {}
     for prop in self.getTestedPropertyList():
       property_dict['%s_list' % prop] = sorted(
-        movement.getPropertyList(prop, None))
+        movement.getPropertyList(prop))
     return property_dict
 
   def test(self, document, property_dict, property_list=None, **kw):