diff --git a/html/graph.php b/html/graph.php
index 99c53bd29..0eff18fc3 100644
--- a/html/graph.php
+++ b/html/graph.php
@@ -40,8 +40,9 @@ require_once '../includes/dbFacile.php';
 require_once '../includes/rewrites.php';
 require_once 'includes/functions.inc.php';
 require_once '../includes/rrdtool.inc.php';
-require_once 'includes/authenticate.inc.php';
-
+if($config['allow_unauth_graphs'] != true) {
+  require_once 'includes/authenticate.inc.php';
+}
 require 'includes/graphs/graph.inc.php';
 
 $console_color = new Console_Color2();
diff --git a/includes/defaults.inc.php b/includes/defaults.inc.php
index d12854016..2f01dc6bc 100644
--- a/includes/defaults.inc.php
+++ b/includes/defaults.inc.php
@@ -568,7 +568,7 @@ $config['irc_alert']      = false;
 $config['irc_alert_utf8'] = false;
 
 // Authentication
-$config['allow_unauth_graphs'] = 0;
+$config['allow_unauth_graphs'] = false;
 // Allow graphs to be viewed by anyone
 $config['allow_unauth_graphs_cidr'] = array();
 // Allow graphs to be viewed without authorisation from certain IP ranges