diff --git a/addons/base_action_rule/base_action_rule.py b/addons/base_action_rule/base_action_rule.py
index 2d239adada2..51661f9eb00 100644
--- a/addons/base_action_rule/base_action_rule.py
+++ b/addons/base_action_rule/base_action_rule.py
@@ -171,6 +171,8 @@ the rule to mark CC(mail to any other person defined in actions)."),
         `post_action`, in that order.
         """
         def wrapper(cr, uid, vals, context=context):
+            if context is None:
+                context = {}
             new_id = old_create(cr, uid, vals, context=context)
             if not context.get('action'):
                 self.post_action(cr, uid, [new_id], model, context=context)
@@ -183,6 +185,8 @@ the rule to mark CC(mail to any other person defined in actions)."),
         `post_action`, in that order.
         """
         def wrapper(cr, uid, ids, vals, context=context):
+            if context is None:
+                context = {}
             if isinstance(ids, (str, int, long)):
                 ids = [ids]
             old_write(cr, uid, ids, vals, context=context)