diff --git a/booking.emails.inc b/booking.emails.inc
index a3d9013..2daea6b 100644
--- a/booking.emails.inc
+++ b/booking.emails.inc
@@ -1,6 +1,6 @@
 <?php
 
-function booking_manual_email($preselected = "")
+function booking_manual_email($input_option = "")
 {
 	global $event;
 	//see http://www.jaypan.com/blog/themeing-drupal-7-forms-tables-checkboxes-or-radios