diff --git a/product/ERP5/Document/Budget.py b/product/ERP5/Document/Budget.py
index 2f5a488840b73ec7af1899c3d84dfe8e120b851a..223febc587545440ce3b6a2a9d5dd9801bea0570 100644
--- a/product/ERP5/Document/Budget.py
+++ b/product/ERP5/Document/Budget.py
@@ -55,6 +55,8 @@ class Budget(Predicate, Variated):
                       , PropertySheet.Budget
                       , PropertySheet.Path
                       , PropertySheet.VariationRange
+                      , PropertySheet.Reference
+                      , PropertySheet.Version
                       )
 
     # CMF Type Definition