BCE0018: 'MovieTexture' does not denote a valid type ('not found').

I am making a game for android and have only just thought of adding a menu to it now. In the menu I have a movie playing on a plane, then I have guitextures acting as buttons. When I try and compile the game into an apk file it says "BCE0018: 'MovieTexture' does not denote a valid type ('not found')." in the console. Here is the script that the error is coming from:

 #pragma strict
 
 var movTexture : MovieTexture;
 
 function Start () {
     GetComponent.<Renderer>().material.mainTexture = movTexture;
     movTexture.Play();
 }
 
 function Update () {
 
 }