Error in line 5 of webmail_ajax.module.

I recently enable mail, imap, smtp, webmail, and webmail_ajax. When I enable webmail_ajax, I receive the following error:

Fatal error: Cannot redeclare webmail_menu() (previously declared in /root/path/to/modules/webmail/webmail.module:18) in /root/path/to/modules/webmail/webmail_ajax/webmail_ajax.module on line 5

Here are the first 10 lines of code.

<?php

// $Id: webmail_ajax.module,v 1.1 2007/08/24 20:41:11 gcopenhaver Exp $

function webmail_menu($may_cache) {
  $items = array();
  if(!$may_cache) {
    $items[] = array(
      'title' => t('Ajax'),
      'path' => 'webmail/ajax',

I change the variable name in line five to equal webmail_ajax_menu and the error goes away. This is an FYI. I'm uncertain if this caused any other problems.