diff --git a/includes/smarty.php b/includes/smarty.php
index cbeea2d..5b8fdb4 100644
--- a/includes/smarty.php
+++ b/includes/smarty.php
@@ -146,8 +146,10 @@ function display_template($template, $pagetitle=false) {
   }
 }
 
-function display_ajax_return($data) {
+function display_ajax_return($data=null, $pretty=false) {
   global $debug_ajax;
+  if (is_null($data))
+    $data = array();
   if (isset($_SESSION['messages']) && !empty($_SESSION['messages'])) {
     $data['messages'] = $_SESSION['messages'];
     unset($_SESSION['messages']);
@@ -159,7 +161,7 @@ function display_ajax_return($data) {
   if ($debug_ajax)
     logging('DEBUG',"Ajax Response : ".vardump($data));
   header('Content-Type: application/json');
-  echo json_encode($data);
+  echo json_encode($data, (($pretty||isset($_REQUEST['pretty']))?JSON_PRETTY_PRINT:0));
   exit();
 }