diff --git a/booking.emails_admin.inc b/booking.emails_admin.inc
index 3b1e61b..0f5ea00 100644
--- a/booking.emails_admin.inc
+++ b/booking.emails_admin.inc
@@ -85,7 +85,7 @@ function booking_emails_admin() {
     '#description' => t('Text to use in an email indicating the person has booked in, paid their deposit and is not on the waiting list'),
     '#default_value' => variable_get('booking_email_bookedin_text', $default_email_text),
   );	
-  $form['emails']['booking_email_bookedin_text'][] = $textarea_defaults;
+  $form['emails']['booking_email_bookedin_text'] += $textarea_defaults;
   $form['emails']['booking_email_regn_complete_text'] = array(
     '#title' => t('Payment Complete Email'),
     '#type' => 'textarea',