OnCollisionExit2D gives a script error

Hi, I have a script with oncollisionenter2d and oncollisionexit2d. The collisionenter2d works fine but the oncollisionexit2d gives a script error. Any help would be appreciated

Script error: OnCollisionExit2D This message parameter has to be of type: Collision2D The message will be ignored.

The code is below

 void OnCollisionEnter2D(Collision2D coll) {
     if(coll.gameObject.tag == "Planets")
     {
         pivotAttached = true;
         pGravityScript.setLanded(true);
         Debug.Log("Hit Planet");

         if(pGravityScript.getCurrentPlanet()!=null) // if there is a currentPlanet then
         {
             pivotPoint = pGravityScript.getCurrentPlanet().transform;
             pGravityScript.setCurrentPlanet(null);

         }
     }        
 }

  void OnCollisionExit2D(Collider2D c)
 {

 }