unexpected symbol 'rigidbody2D'

using UnityEngine;
using System.Collections;

public class RocketScript : MonoBehaviour {
	public Vector2 speed = new Vector2(0, 20);
	
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {




	
	}
	void FixedUpdate () {
		if (Input.GetKeyDown(KeyCode.UpArrow)

		    rigidbody2D.velocity=speed;
		
		
	}
}


thats my code and it keeps saying that. Whats wrong with it? Any help would be appreciated.

You are missing a ‘)’ at the end of line 15.