diff --git a/html/includes/functions.inc.php b/html/includes/functions.inc.php
index 74e6a8d84d..b303255908 100644
--- a/html/includes/functions.inc.php
+++ b/html/includes/functions.inc.php
@@ -461,6 +461,7 @@ function generate_graph_tag($args) {
 }//end generate_graph_tag()
 
 function generate_lazy_graph_tag($args) {
+    global $config;
     $urlargs = array();
     $w = 0;
     $h = 0;