diff --git a/html/includes/graphs/hrstorage.inc.php b/html/includes/graphs/hrstorage.inc.php
index 32010ef991..0fec446e7b 100644
--- a/html/includes/graphs/hrstorage.inc.php
+++ b/html/includes/graphs/hrstorage.inc.php
@@ -1,6 +1,7 @@
 <?php
 
 $scale_min = "0";
+$scale_max = "100";
 
 include("common.inc.php");