can't find the error to make a POJO

package com.teamtreehouse.contactmgr.model

public class Contact {

    private int id;
    private String firstName;
    private String lastName;
    private String email;

   public Contact(int id,String firstName,String lastName,String email){
     this.id = id;
     this.firstName = firstName;
     this.lastName = lastname;
     this.email = email;
   }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}