diff --git a/front/php/templates/graph.php b/front/php/templates/graph.php
index 32388707..a273e26f 100755
--- a/front/php/templates/graph.php
+++ b/front/php/templates/graph.php
@@ -2,6 +2,8 @@
 
 require 'php/server/db.php';
 
+global $db;
+
 $Pia_Graph_Device_Time = array();
 $Pia_Graph_Device_All = array();
 $Pia_Graph_Device_Online = array();