diff --git a/tailbone/templates/tempmon/probes/graph.mako b/tailbone/templates/tempmon/probes/graph.mako
index 179107a9..c197b33f 100644
--- a/tailbone/templates/tempmon/probes/graph.mako
+++ b/tailbone/templates/tempmon/probes/graph.mako
@@ -150,10 +150,8 @@
   ${parent.modify_this_page_vars()}
   <script type="text/javascript">
 
-    ThisPage.data = function() { return {
-        currentTimeRange: ${json.dumps(current_time_range)|n},
-        chart: null,
-    }}
+    ThisPageData.currentTimeRange = ${json.dumps(current_time_range)|n}
+    ThisPageData.chart = null
 
     ThisPage.methods.fetchReadings = function(timeRange) {