How to continue streaming replication after this error?

Hi,

one of our streaming replicas died with

2014-02-21 05:17:10 UTC PANIC: heap2_redo: unknown op code 32
2014-02-21 05:17:10 UTC CONTEXT: xlog redo UNKNOWN
2014-02-21 05:17:11 UTC LOG: startup process (PID 1060) was terminated
by signal 6: Aborted
2014-02-21 05:17:11 UTC LOG: terminating any other active server processes
2014-02-21 05:17:11 UTC WARNING: terminating connection because of
crash of another server process
2014-02-21 05:17:11 UTC DETAIL: The postmaster has commanded this
server process to roll back the current transaction and exit, because
another server process exited abnormally and possibly corrupted shared
memory.
2014-02-21 05:17:11 UTC HINT: In a moment you should be able to
reconnect to the database and repeat your command.

Now, if I try to restart it, I get this:

The PostgreSQL server failed to start. Please check the log output:
2014-02-21 07:42:53 UTC LOG: database system was interrupted while in
recovery at log time 2014-02-21 05:02:45 UTC
2014-02-21 07:42:53 UTC HINT: If this has occurred more than once some
data might be corrupted and you might need to choose an earlier recovery
target.
2014-02-21 07:42:53 UTC LOG: incomplete startup packet
2014-02-21 07:42:53 UTC LOG: entering standby mode
2014-02-21 07:42:53 UTC LOG: redo starts at 11C/B2211778
2014-02-21 07:42:53 UTC FATAL: the database system is starting up
2014-02-21 07:42:54 UTC LOG: consistent recovery state reached at
11C/B4234108
2014-02-21 07:42:54 UTC LOG: database system is ready to accept read
only connections
2014-02-21 07:42:54 UTC PANIC: heap2_redo: unknown op code 32
2014-02-21 07:42:54 UTC CONTEXT: xlog redo UNKNOWN
2014-02-21 07:42:54 UTC LOG: startup process (PID 38187) was terminated
by signal 6: Aborted
2014-02-21 07:42:54 UTC LOG: terminating any other active server processes

This is 9.3.2. What is the supposed way to continue replication? Or do I
need to start from a fresh base backup?

Thanks,
Torsten