Script bug (gameObject.tag)

Hey! So I have a script so that the player loses health on a collider. It worked well however, it worked on every single collider and I do not want that. So I added an IF statement saying it should only do that if the tag is set to "Enemy" however, it does not work at all now unless I remove the If statement but then I have the problem as above, If anyone can help I would be grateful!

using UnityEngine; using System.Collections; using UnityEngine.SceneManagement;

public class Player : MonoBehaviour {

 [SerializeField] 
 private Stat health;

 // Use this for initialization
 private void Awake()
 {
     health.Initialize();
 }
 // Update is called once per frame
 void Update ()
 {
     if (health.CurrentVal == 0) 
     {
         SceneManager.LoadScene ("02");
     }
 }


     void OnTriggerEnter2D(Collider2D other)
 {
     if (gameObject.tag == "Enemy") 
     {
         health.CurrentVal -= 10;
     }
 }

}