diff --git a/html/includes/table/sensors.inc.php b/html/includes/table/sensors.inc.php
index 5bf9641936..e054442ea3 100644
--- a/html/includes/table/sensors.inc.php
+++ b/html/includes/table/sensors.inc.php
@@ -80,7 +80,7 @@ foreach (dbFetchRows($sql, $param) as $sensor) {
 
     $link = generate_url(array('page' => 'device', 'device' => $sensor['device_id'], 'tab' => 'health', 'metric' => $sensor['sensor_class']));
 
-    $overlib_content = '<div style="width: 580px;"><h2>'.$device['hostname'].' - '.$sensor['sensor_descr'].'</h1>';
+    $overlib_content = '<div style="width: 580px;"><h2>'.$sensor['hostname'].' - '.$sensor['sensor_descr'].'</h1>';
     foreach (array('day', 'week', 'month', 'year') as $period) {
         $graph_array['from'] = $config['time'][$period];
         $overlib_content    .= str_replace('"', "\'", generate_graph_tag($graph_array));