dbms_xplan and Statspack 12c oops

on the brink of new year's eve here's my last subject for 2015: Up to Oracle 11.2 it was possible to display archived SQL plans from Statspack using DBMS_XPLAN. I make use of this in some of my scripts and SQL Developer Reports since I first saw this in Christian Antognini's Book "Troubleshooting Oracle Performance".
But in 12c (here: 12.1.0.1 on Linux), there's a piece missing now:

select * from table(dbms_xplan.display(

  table_name   => 'perfstat.stats$sql_plan',
  statement_id => null,
  format       => 'ALL -predicate -note',
  filter_preds => 'plan_hash_value = '|| &phv

ERROR: an uncaught error in function display has happened; please contact Oracle support

       Please provide also a DMP file of the used plan table perfstat.stats$sql_plan

       ORA-00904: "TIMESTAMP": invalid identifier

So it looks like STATS$SQL_PLAN wasn't synchronized to the changes in 12c's PLAN_TABLE. Maybe because the timestamp wouldn't make much sense there, anyway, maybe simply because Oracle forgot. A quick Google and MOS search didn't return anything related to this specific error; should I really be the first to experience this or did any of you folks stumble into this error as well?

==> Quick, dirty and most certainly unsupported workaround:

alter table stats$sql_plan add (timestamp date);

A less dirty workaround could be to create a separate view with an additional dummy timestamp column an reference the view. Any better suggestions (aside from opening an SR)?

Have a safe journey into 2016!

Cheers,
Uwe

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