Cluster - Slave not found Master

I created a DNS slave on another server with webmin as a very good article I found here on the site.
However, the DNS server that functions as a slave does not start because the BIND nameserver can not resolve ns1.mydomain.tld (master server). The error:
Unable to find masters list ‘ns1.mydomain.tld’

Does eeu have to create a master zone on slave server with a reverse record?