postgresql CentOS 7.1 systemd streaming replica startup

Hello,

I am using postgresql 9.3.4 on CentOS 7.1. I have configured replication
correctly, and attempted to use the systemD unit file included in the
pgdg-provided package to start the replica. Unfortunately while the
replica appears to start correctly and I can monitor active WAL streaming,
the systemd startup script aborts reporting that startup did not complete
correctly.

Looking at the systemd unit file,The start command is:

ExecStart=/usr/pgsql-9.3/bin/pg_ctl start -D ${PGDATA} -s -w -t 300

Is it perhaps the -w parameter when starting a replica that causes systemd
to not recognize that the replica has started correctly?

Thank you,
Eugene