EXTRAVERSION ignores "-" when making kernel from src.rpm

[Jay Cliburn]

Is there a way to get the "-" included as part of the EXTRAVERSION field 
when making a Fedora kernel?  If I change EXTRAVERSION = -foo in the 
master Makefile, I end up with an rpm named kernel-2.6.15foo.  I've 
tried escaping the dash, double-quoting the entire EXTRAVERSION field, 
and manually setting KERNELVERSION = 2.6.15-foo, but nothing seems to work.

Thanks,
Jay