Reverse not working

Checking for reverse doesn’t work, eg.:

#check_dns_host.pl -H 8.8.8.8.in-addr.arpa -Q REVERSE -W 1000 -C 1000

DNS OK! QUERYRETURNCODE=(NOERROR => 8.8.8.8.in-addr.arpa) ANSWERS=(0) QUERY_RETURNVAL=() ELAPSED=(8 ms) | DurationMS=8

Reverse checks always return ANSWERS=(0).

Forward seems to work fine.