diff --git a/account.py b/account.py
index ffea76b011..28dcb5b31a 100644
--- a/account.py
+++ b/account.py
@@ -1066,7 +1066,7 @@ class OpenChartAccount(Wizard):
 
     def do_open_(self, session, action):
         action['pyson_context'] = PYSONEncoder().encode({
-            'fiscalyear': session.start.fiscalyear,
+            'fiscalyear': session.start.fiscalyear.id,
             'posted': session.start.posted,
             })
         return action, {}