If your on a 64-bit installation download the following packages (or the latest kernel):
linux-headers-3.xx.x-gnu_1.0_amd64.deb
linux-image-3.xx.x-gnu_1.0_amd64.deb
linux-source-3.xx.x-gnu_1.0_all.deb
You can get these packages from (you'll need to locate the directory that says linux-source-3.14.1-gnu, but the 3.14.1 part may be newer):
http://linux-libre.fsfla.org/pub/linux-libre/freesh/pool/main/l/
Then open a terminal and run:
sudo dpkg -i *deb