Yum chowning after update

Hello,

I'm using F17 on my web server. My web server contains lighttpd!, php, etc.. All software are installed from default repositories, so php requires apache web server. I disabled apache. But the problems is that everytime I do php update, yum chowns /var/lib/php/session folder to root:apache. How I can chown permanently this folder or how to remove chown from yum update?

Thanks