diff --git a/booking.emails.inc b/booking.emails.inc
index 6ed7cc3..a733c79 100644
--- a/booking.emails.inc
+++ b/booking.emails.inc
@@ -257,6 +257,7 @@ function _booking_manual_email_selecttype_ajax_callback($form, &$form_state) {
 	
 	$form['new']['table'] =  array (
 		'#type' => 'tableselect',
+		'#multiple' => TRUE,
 		'#header' => $header,
 		'#options' => $options,
 		'#default_value' => $new_default_values,