diff --git a/addons/sale_order_dates/sale_order_dates.py b/addons/sale_order_dates/sale_order_dates.py
index d58c005502e..cfefa372f8c 100644
--- a/addons/sale_order_dates/sale_order_dates.py
+++ b/addons/sale_order_dates/sale_order_dates.py
@@ -88,7 +88,8 @@ class sale_order_dates(osv.osv):
                  "a date that you can promise to the customer, based on the "
                  "Product Lead Times."),
         'requested_date': fields.datetime('Requested Date',
-            readonly=True, states={'draft': [('readonly', False)]}, copy=False,
+            readonly=True, states={'draft': [('readonly', False)],
+                                   'sent': [('readonly', False)]}, copy=False,
             help="Date by which the customer has requested the items to be "
                  "delivered.\n"
                  "When this Order gets confirmed, the Delivery Order's "