diff --git a/addons/event/event.py b/addons/event/event.py
index b18f7618985..02fe6ff6a0c 100644
--- a/addons/event/event.py
+++ b/addons/event/event.py
@@ -101,6 +101,8 @@ class event_event(osv.osv):
         @param context: A standard dictionary for contextual values
         @return: True
         """
+        if context is None:
+            context = {}
         res = False
         if type(ids) in (int, long,):
             ids = [ids]
diff --git a/addons/point_of_sale/point_of_sale.py b/addons/point_of_sale/point_of_sale.py
index 71333fc7c9d..fa2de26f4e8 100644
--- a/addons/point_of_sale/point_of_sale.py
+++ b/addons/point_of_sale/point_of_sale.py
@@ -125,7 +125,7 @@ class pos_order(osv.osv):
         @return: Dictionary of values """
         res = {}
         val = None
-        for order in self.browse(cr, uid, ids, context=context):
+        for order in self.browse(cr, uid, ids):
             cr.execute("SELECT date_validation FROM pos_order WHERE id = %s", (order.id,))
             date_p = cr.fetchone()
             date_p = date_p and date_p[0] or None