diff --git a/product/ERP5/Document/Amount.py b/product/ERP5/Document/Amount.py
index 2fce192076313d30d69cdbcbea449094e281c582..5986ea9b6bedec6c617ea8b3172c9e611dc9f555 100755
--- a/product/ERP5/Document/Amount.py
+++ b/product/ERP5/Document/Amount.py
@@ -162,7 +162,7 @@ class Amount(Base, Variated):
     try:
       return self.getDefaultResourceValue().getVariationBaseCategoryList()
     except:
-      return self.portal_categories.getObjectIds()
+      return self.portal_categories.getBaseCategoryList()
 
   security.declareProtected(Permissions.AccessContentsInformation,
                                                  'getQuantityUnitRangeItemList')