diff --git a/python/smap/data/index.html b/python/smap/data/index.html
index 540948c..f7f8530 100644
--- a/python/smap/data/index.html
+++ b/python/smap/data/index.html
@@ -54,9 +54,15 @@
       });
 
       function latest(r) {
+        if (!r.length) {
+          return undefined;
+        }
         return r.slice(-1)[0][1];
       }
       function latestts(r) {
+        if (!r.length) {
+          return undefined;
+        }
         return r.slice(-1)[0][0];
       }
       function resetUpdater() {
@@ -174,8 +180,8 @@
       function makeTimeseries(path, meta) {
 			    console.log(meta);
         if (meta['Actuator'] === undefined) {
-          return latest(meta["Readings"]) + 
-                 meta ["Properties"]["UnitofMeasure"];
+          return latest(meta["Readings"]) + " " +
+                 meta["Properties"]["UnitofMeasure"];
         } else if (meta['Actuator']['Model'] == 'binary') {
           return makeBinaryActuator(path, meta);
         } else if (meta['Actuator']['Model'] == 'discrete') {