diff --git a/usr/local/www/status_rrd_graph_img.php b/usr/local/www/status_rrd_graph_img.php
index b22abdb3d5..fa3f43f485 100644
--- a/usr/local/www/status_rrd_graph_img.php
+++ b/usr/local/www/status_rrd_graph_img.php
@@ -38,6 +38,8 @@ require_once("filter.inc");
 require_once("shaper.inc");
 require_once("rrd.inc");
 
+global $g;
+
 $pgtitle = array(gettext("System"),gettext("RRD Graphs"),gettext("Image viewer"));
 
 if ($_GET['database']) {