How To Prevent Plastic Mat From Moving On Carpet

We just laid new carpeting three months ago. I bought a new plastic mat so it doesn’t wear out the carpet underneath the computer chair. There’s a slight problem though, the mat keeps moving towards the wall and it would curl up, and I have to constantly pull it back. This happens on a daily basis. I read online that you can secure a plastic map to the carpet and floor using really long tacks, but I really don’t want to do that. Another option is to use some kind of carpet gripper underneath the mat. I don’t want to mess up the carpet either. Finally, it dawned on me, why don’t I just place the plastic mat underneath one or a couple of the legs of the desk.

mat

Problem solved.