I'm trying to compile some modules on my Redhat 7.1 box but when I do I get an error:

/usr/include/linux/modversions.h:1:2: #error Modules should never use
kernel-headers system headers,
/usr/include/linux/modversions.h:2:2: #error but headers from an
appropriate kernel-source

I'm told I need to install the correct kernel-source.  Anybody know what
kernel-source package I should install?  I don't want to mess up my
system too much.  I installed the kernel-source that was on Red Carpet
(because installing stuff with Red Carpet is fun!) but that didn't seem
to make any difference.

Thanks,
Brady