Script can't find camera?

Assets/Script/ThirdPersonCamera.cs(21,17): error CS0029: Cannot implicitly convert type `UnityEngine.Camera' to `ThirdPersonCamera'

public class ThirdPersonCamera : MonoBehaviour {

public Transform lookAt;
public Transform CamTransform;

private ThirdPersonCamera Cam;

private float distance = 10.0f;
private float currentX = 0.0f;
private float currentY = 0.0f;
private float sensivityX = 4.0f;
private float sensivityY = 1.0f;

private void Start()
{

CamTransform = transform;
Cam = Camera.main;

}
}

 

Should be:

 

Ah thanks, I think the editor added it by itself when I was typing, and I didn't notice it.
Sometimes it's annyoing