OnCollisionEnter not working with standard First Person Controller?

My Game Object has a script attached which logs the name of anything colliding with it in OnCollisionEnter:

void OnCollisionEnter(Collision coll)
{
    Debug.Log(coll.gameObject.name);
}

It works correctly when colliding with any object except for the standard Unity First Person Controller. In fact, it seems never to detect this collision. Do I have to do anything special in this case?

Thanks