diff --git a/include/ajax.tickets.php b/include/ajax.tickets.php
index 3338ea4c536f334dcf73df470ecb62d2182b6e37..beb0c56135347e2ce559add0e351e9259ee02aed 100644
--- a/include/ajax.tickets.php
+++ b/include/ajax.tickets.php
@@ -1285,7 +1285,7 @@ function refer($tid, $target=null) {
                 case 'unanswered':
                     if(!$ticket->isAnswered())
                         $errors['err'] = __('Ticket is already marked as unanswered');
-                    elseif (!$ticket->markUnanswered())
+                    elseif (!$ticket->markUnAnswered())
                         $errors['err'] - __('Cannot mark ticket as unanswered');
                     break;