public function updateSearchForm(Form $form) {
		$cms = $this->owner;
		$req = $cms->getRequest();

		$sites = Site::get()->sort(array(
			'IsDefault' => 'DESC',
			'Title'     => 'ASC'
		));

		$site = new DropdownField(
			'q[SiteID]',
			_t('Multisites.SITE', 'Site'),
			$sites->map(),
			isset($req['q']['SiteID']) ? $req['q']['SiteID'] : null
		);
		$site->setEmptyString(_t('Multisites.ALLSITES', 'All sites'));

		$form->Fields()->insertAfter($site, 'q[Term]');
	}