diff --git a/bin/cargo b/bin/cargo
index 560b7fb..b218041 100755
--- a/bin/cargo
+++ b/bin/cargo
@@ -5,7 +5,11 @@ var io    = require('socket.io').listen(8080)
   , fs    = require('fs');
 
 io.sockets.on('connection', function(socket) {
-  setInterval(function() { socket.emit('scale', scale.poll().value) }, 250);
+  setInterval(function() {
+    if(res = scale.poll()) {
+      socket.emit(res.value);
+    }
+  }, 250);
 
   socket.on('printer', function(data) {
     var path = '/tmp/' + new Date().getTime();