diff --git a/package/gluon-status-page/src/js/lib/gui/statistics.js b/package/gluon-status-page/src/js/lib/gui/statistics.js
index 2f3e6e27..de14072d 100644
--- a/package/gluon-status-page/src/js/lib/gui/statistics.js
+++ b/package/gluon-status-page/src/js/lib/gui/statistics.js
@@ -184,6 +184,10 @@ define(["lib/helper"], function (Helper) {
   function prettyPrefix(prefixes, step, d) {
     var prefix = 0
 
+    if (d == undefined) {
+	d = 0
+    }
+
     while (d > step && prefix < prefixes.length - 1) {
       d /= step
       prefix++