kadmind (1.5.2) not respecting --keytab parameter

I am trying to run kadmind using Heimdal 1.5.2 (delayed from moving to 
more recent version by technical issues).

I use this to start the service:

/usr/lib/heimdal-servers/kadmind --keytab=/etc/heimdal-kdc/kadmin.keytab 
--config-file=/etc/heimdal-kdc/kdc.conf --debug

When I run a kadmin command from another server this is the error that 
shows up in the logs:

017-03-25T16:31:13.895643-07:00 kerberos-qa1 kadmind[1667]: 
Miscellaneous failure (see text)
2017-03-25T16:31:13.895733-07:00 kerberos-qa1 kadmind[1667]: Failed to 
find kadmin/[email protected](kvno 1) in keytab FILE:/etc/krb5.keytab 
(aes256-cts-hmac-sha1-96)
2017-03-25T16:31:13.895932-07:00 kerberos-qa1 kadmind[1667]: gss error, exit

Why is kadmind looking at /etc/krb5.keytab when I specified the keytab 
file with the --keytab parameter?

Thanks, Adam Lewenberg