[CentOS] rkhunter

I updated java-1.7.0-openjdk a few hours ago - it *was* listed as a
critical security update, and I don't want yelling from rkhunter. The man
page tells me I can tell it rkhunter --propupd <package name>... but it
doesn't know the name above as a package. Been googling a bit, and cannot
find a good example of a package (other than the manpage's coreutil).

Anyone got an example, and/or why it doesn't know this package?

       mark