CakePHP HABTM problem

cake_habtm.php

CREATE TABLE `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(100) NOT NULL,
  `created` datetime DEFAULT NULL,
  `modified` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
);

CREATE TABLE `announcements` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `message` text NOT NULL,
  `created` datetime DEFAULT NULL,
  `modified` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
);

CREATE TABLE `announcements_users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `announcement_id` int(11) NOT NULL,
  `user_id` int(11) NOT NULL,
  `deleted` int(1) NOT NULL DEFAULT '0',
  `created` datetime DEFAULT NULL,
  `modified` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
);

class User extends AppModel {
  var $name = 'User';
  var $hasAndBelongsToMany = array('Announcement');
}

class Announcement extends AppModel {
  var $name = 'Announcement';
}

class AnnouncementUser extends AppModel {
  var $name = 'AnnouncementUser';
}

SQL Produced: -

SELECT `Announcement`.`id`, `Announcement`.`from`, `Announcement`.`subject`, `Announcement`.`message`, `Announcement`.`visible`, `Announcement`.`created`, `Announcement`.`modified`, `AnnouncementsUser`.`id`, `AnnouncementsUser`.`announcement_id`, `AnnouncementsUser`.`user_id`, `AnnouncementsUser`.`deleted`, `AnnouncementsUser`.`created`, `AnnouncementsUser`.`modified` FROM `announcements` AS `Announcement` JOIN `announcements_users` AS `AnnouncementsUser` ON (`AnnouncementsUser`.`user_id` = 3 AND `AnnouncementsUser`.`announcement_id` = `Announcement`.`id`)

Where as I really need the SQL to be a LEFT JOIN: -

SELECT `Announcement`.`id`, `Announcement`.`from`, `Announcement`.`subject`, `Announcement`.`message`, `Announcement`.`visible`, `Announcement`.`created`, `Announcement`.`modified`, `AnnouncementsUser`.`id`, `AnnouncementsUser`.`announcement_id`, `AnnouncementsUser`.`user_id`, `AnnouncementsUser`.`deleted`, `AnnouncementsUser`.`created`, `AnnouncementsUser`.`modified` FROM `announcements` AS `Announcement` LEFT JOIN `announcements_users` AS `AnnouncementsUser` ON (`AnnouncementsUser`.`user_id` = 3 AND `AnnouncementsUser`.`announcement_id` = `Announcement`.`id`)