diff --git a/product/ERP5/Document/Resource.py b/product/ERP5/Document/Resource.py
index 783b362c14d3092e28eb275b7409fee97727c64e..0d79e4bd440fd8ddf82d6bb807ef023b9c856ea5 100755
--- a/product/ERP5/Document/Resource.py
+++ b/product/ERP5/Document/Resource.py
@@ -71,6 +71,7 @@ class Resource(XMLMatrix, CoreResource, Variated):
                       , PropertySheet.Reference
                       , PropertySheet.FlowCapacity
                       , PropertySheet.VariationRange
+                      , PropertySheet.DefaultSupply
                       )
 
     # Is it OK now ?