Convert type `UnityEngine.Collider' to `string'?

How can I do what this script does but without getting this error?

Error:

 Assets/FPS/Scripts/Managers/Enemy.cs(13,46): error CS1503: Argument `#1' cannot convert `UnityEngine.Collider' expression to type `UnityEngine.Transform'

Code:

 void OnTriggerStay(Collider other) {
     if (other.tag == "Player"){transform.LookAt(other);}
 }