diff --git a/booking.admin.inc b/booking.admin.inc
index 75cb7a1..0e51693 100644
--- a/booking.admin.inc
+++ b/booking.admin.inc
@@ -328,7 +328,7 @@ function booking_admin() {
 		'#type' => 'select',
 		'#multiple' => TRUE,
 		'#title' => t('Select help areas to enable'),
-		'#description' => t('Select which questions to include in the booking form.'),
+		'#description' => t('Select which questions to include in the booking form. Ensure you hold down control/command when selecting multiple options.'),
 		'#options' => _booking_get_help_areas(),
 		'#default_value' => variable_get('booking_enabled_helparea_options', ''),
 		'#states' => array(