diff --git a/openerp/addons/base/rng/view.rng b/openerp/addons/base/rng/view.rng
index 383b4164fa7..a5f092b0000 100644
--- a/openerp/addons/base/rng/view.rng
+++ b/openerp/addons/base/rng/view.rng
@@ -648,6 +648,8 @@
             <rng:optional><rng:attribute name="day_length" /></rng:optional>
             <rng:optional><rng:attribute name="date_delay" /></rng:optional>
             <rng:optional><rng:attribute name="all_day" /></rng:optional>
+            <rng:optional><rng:attribute name="attendee" /></rng:optional>
+            <rng:optional><rng:attribute name="display" /></rng:optional>
             <rng:optional><rng:attribute name="type" /></rng:optional>
             <rng:optional><rng:attribute name="mode" /></rng:optional>
             <rng:oneOrMore>
diff --git a/openerp/osv/orm.py b/openerp/osv/orm.py
index a102dcd5ba4..6dba42d5926 100644
--- a/openerp/osv/orm.py
+++ b/openerp/osv/orm.py
@@ -1819,7 +1819,7 @@ class BaseModel(object):
             in_tree_view = node.tag == 'tree'
 
         elif node.tag == 'calendar':
-            for additional_field in ('date_start', 'date_delay', 'date_stop', 'color', 'all_day'):
+            for additional_field in ('date_start', 'date_delay', 'date_stop', 'color', 'all_day','attendee'):
                 if node.get(additional_field):
                     fields[node.get(additional_field)] = {}