transform could not be found

Hello all, I have the following code :

 using UnityEngine;
 using System.Collections;
 [RequireComponent(typeof(tk2dAnimatedSprite))]
 [RequireComponent(typeof(PlayMakerFSM))]
 public class NPC : MonoBehaviour
 {
     bool isFollowingTarget = false;
     transform followTarget;
     
     void FollowTarget()
     {
 
     }
     void LerpingToFollowTarget()
     {
 
     }
 }

The problem is that I get the following error : Assets/Scripts/Characters/NPC.cs(8,5): error CS0246: The type or namespace name `transform' could not be found. Are you missing a using directive or an assembly reference? Does anyone have any ideea what this could be from ?

Regards