diff --git a/lib/pebble.js b/lib/pebble.js
index d8ea2f716..7f5e8e64a 100644
--- a/lib/pebble.js
+++ b/lib/pebble.js
@@ -21,17 +21,9 @@ function directionToTrend (direction) {
 
 function pebble (req, res) {
   var ONE_DAY = 24 * 60 * 60 * 1000;
+  var useMetricBg = (req.query.units === "mmol");
   var uploaderBattery;
 
-  function requestMetric() {
-      var units = req.query.units;
-      if (units == "mmol") {
-        return true;
-      }
-      return false;
-  }
-  var useMetricBg = requestMetric();
-
   function scaleBg(bg) {
       if (useMetricBg) {
           return (Math.round((bg / 18) * 10) / 10).toFixed(1);