diff --git a/product/ERP5/PropertySheet/OpenOrder.py b/product/ERP5/PropertySheet/OpenOrder.py
index 2df282ee00c3f590a14aa72d19da6014d8a68a27..86264a19dc1426ea429dad6ba3edff478bf479a1 100644
--- a/product/ERP5/PropertySheet/OpenOrder.py
+++ b/product/ERP5/PropertySheet/OpenOrder.py
@@ -32,7 +32,7 @@ class OpenOrder:
   """
 
   _properties = (
-    {   'id'          : 'forecasting_term_days',
+    {   'id'          : 'forecasting_term_day_count',
         'description' : 'A number of days to be forecasted.',
         'type'        : 'int',
         'mode'        : 'w' },