diff --git a/library/Icinga/Chart/Graph/BarGraph.php b/library/Icinga/Chart/Graph/BarGraph.php
index 3d6a5c234..1225307ad 100644
--- a/library/Icinga/Chart/Graph/BarGraph.php
+++ b/library/Icinga/Chart/Graph/BarGraph.php
@@ -144,7 +144,7 @@ class BarGraph extends Styleable implements Drawable
                     $this->tooltips[$x]->renderNoHtml($this->order, $data, $format)
                 );
                 $bar->setAttribute(
-                    'title-rich',
+                    'data-title-rich',
                     $this->tooltips[$x]->render($this->order, $data, $format)
                 );
             }
diff --git a/public/js/icinga/events.js b/public/js/icinga/events.js
index 6cae68f0c..e786a35da 100644
--- a/public/js/icinga/events.js
+++ b/public/js/icinga/events.js
@@ -116,7 +116,7 @@
 
             $('[title]').each(function () {
                 var $el = $(this);
-                $el.attr('title', $el.attr('title-rich') || $el.attr('title'));
+                $el.attr('title', $el.data('title-rich') || $el.attr('title'));
             });
             $('svg rect.chart-data[title]', el).tipsy({ gravity: 'se', html: true });
             $('.historycolorgrid a[title]', el).tipsy({ gravity: 's', offset: 2 });