Help with basic AI script

Hello! I am receiving an error with my script. Any tips?

Script:

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class AIBullet : MonoBehaviour {

 public GameObject referenceToBulletPrefab;
 public float timeToWaitBetweenShots;

 void Start(){
     InvokeRepeating("ShootBullet", timeToWaitBetweenShots, timeToWaitBetweenShots);
 }
 void ShootBullet(){
      Vector3 positionToShootFrom = new Vector3 (transform.position + transform.forward*1f);

     Instantiate(referenceToBulletPrefab, positionToShootFrom, Quaternion.Euler(Vector3.zero));
     }

 
 // Update is called once per frame
 void Update () {
     
 }

}

ERROR:

Assets/AIBullet.cs(14,34): error CS1729: The type UnityEngine.Vector3' does not contain a constructor that takes 1' arguments