diff --git a/addons/base_calendar/base_calendar.py b/addons/base_calendar/base_calendar.py
index a08af3da241..c778bf6b63a 100644
--- a/addons/base_calendar/base_calendar.py
+++ b/addons/base_calendar/base_calendar.py
@@ -485,7 +485,7 @@ property or property parameter."),
             sub = res_obj.name
             att_infos = []
             if res_obj:
-                other_invitation_ids = self.search(cr, uid, [('ref', '=', res_obj._name + ',' + str(res_obj.id))])a
+                other_invitation_ids = self.search(cr, uid, [('ref', '=', res_obj._name + ',' + str(res_obj.id))])
             else:
                 other_invitation_ids = []