diff --git a/nodejs/ar-com/arduino.js b/nodejs/ar-com/arduino.js
index e818b0a..2589eb4 100644
--- a/nodejs/ar-com/arduino.js
+++ b/nodejs/ar-com/arduino.js
@@ -1,7 +1,7 @@
 var events = require('events'),
     child  = require('child_process'),
     util   = require('util'),
-    serial = require("serialport").SerialPort;
+    serial = require("serialport");
 
 var Arduino = function (baudrate) {
   this.baudrate = baudrate && baudrate || 9600;
@@ -19,7 +19,7 @@ Arduino.prototype.setup = function () {
     buff = buff.slice(0, buff.indexOf('\n'));
     console.log('Guessing serial port ... ' + buff);
 
-    self.serial = new serial(buff, {
+    self.serial = new serial.SerialPort(buff, {
       baudrate: self.baudrate,
       parser: serial.parsers.readline('\n')
     }, false);
@@ -30,7 +30,7 @@ Arduino.prototype.setup = function () {
         return self.success = false;
       }
 
-      serialPort.write(new Buffer('00000000'));
+      self.serial.write(new Buffer('00000000'));
     });
 
     self.success = true;
@@ -53,4 +53,4 @@ Arduino.prototype.processWriteBuffer = function () {
   }
 }
 
-module.exports = Arduino;
\ No newline at end of file
+module.exports = Arduino;