diff --git a/html/includes/graphs/graph.inc.php b/html/includes/graphs/graph.inc.php
index 5c6bfe1c1..f53a9b775 100644
--- a/html/includes/graphs/graph.inc.php
+++ b/html/includes/graphs/graph.inc.php
@@ -61,6 +61,7 @@ function graph_error($string)
 
   $rrd_options .= " HRULE:0#555555";
   $rrd_options .= " --title='".$string."'";
+  $rrd_options .= " --fill-size-mode";
 
   rrdtool_graph($graphfile, $rrd_options);