named-checkzone usage example incorrect

Chapter 7 DNS - section 3 troubleshooting - named-checkzone: The first usage example is O.K. , but the second one, for a reverse zone, I think is incorrect and would give an error message as written.
This line:
named-checkzone example.com /etc/bind/db.192
Should be this (for the example of this guide):
named-checkzone 1.168.192.in-addr.arpa /etc/bind/db.192
And the following example output:
zone example.com/IN: loaded serial 3
OK
Should be this:
zone 1.168.192.in-addr.arpa/IN: loaded serial 3
OK

(I only looked at the 10.10 and 11.04 server guides)