CharacterController had no enabled property

I'm confused by this error:

Assets/Scripts/Path/PathFollower.cs(43,20): error CS1061: Type 'UnityEngine.CharacterController' does not contain a definition for 'enabled' and no extension method 'enabled' of type 'UnityEngine.CharacterController' could be found (are you missing a using directive or an assembly reference?)

in code:

 public void OnDisable () {
   /* set current velocity to zero */
   CharacterController controller = (CharacterController) collider;
   if (controller.enabled == true) {
     controller.SimpleMove(Vector3.zero);
   }

I mean, the error is simple enough, I've tried casting to different components with no luck. But I can't help but notice that enabled is listed as a property of both Collider and CharacterController in the Unity Script Reference. Is the reference wrong, or am I making a mistake?