Replicating from 9.1.10 into 9.3.5

Hi,

Is it possible to set up replication from a 9.1.10 master to  a 9.3.5 slave?
I've taken a base-backup from the master and rsync'd it over to the slave but I'm seeing the following error :

   HINT:  It looks like you need to initdb.
   FATAL:  database files are incompatible with server
   DETAIL:  The database cluster was initialized with PG_CONTROL_VERSION 903, but the server was compiled with
PG_CONTROL_VERSION937. 

Would I be better off dumping the data from 9.1.10 and re-importing into 9.3.5, then starting replication ?
(or is there an easier way?) :)

Cheers,
Rob.