Oracle installation warning with 32bit/6bit RPM's

Dear All,

I installed Oracle several time, Everytime I installed I used to avoid a warning which is related to 32 bit RPMs. My system is 64 bit OS, Oracle also 64 bit. Then why it checks for 32 bit packages during installation. RPMs which is checking by oracle engine is 32bit where as the same 64 bit package is installed in the system marked as passed. Is there any way to avoid this warning. Or I need to install 32 bit packages as well.

Thanks in advanced!!!