udhcpd question Debian squeeze

I am setting up a general purpose server at home (DHCP/caching
DNS/SAMBA) and
have a question about the BusyBox DHCP daemon (udhcpd) in Debian
squeeze.

I have a pretty basic setup, but would like to have a couple devices at
a known IP address.
I currently have these reserved in the appliance that I am replacing so
that a specific MAC address always gets the same IP address.

I found info online about an option that can be added to udhcpd.conf:

static_lease 00:de:ad:be:ef:00 1.2.3.4

Which looks like exactly what I need.  The problem is, I don't know if
it is supported in the version of udhcpd that is supplied with squeeze. 
None of the docs I have mentions   Does anybody know if it is just an
undocumented command, or should I just try it and see if it complains?

If need be, I can convert the devices in question to static IP and
decrease the top end to below them since there are only a few and all
are at the top of the range.  It would be nice if it worked though.

- Mike Scott

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