diff --git a/lib/opencv.js b/lib/opencv.js
index 48a4284..edd51ec 100755
--- a/lib/opencv.js
+++ b/lib/opencv.js
@@ -50,14 +50,14 @@ util.inherits(cv.ImageDataStream, Stream);
 var imagedatastream = cv.ImageDataStream.prototype;
 
 imagedatastream.write = function(buf){
-	this.data.push(buf)	
+	this.data.push(buf)
 	return true;
 }
 
 
 imagedatastream.end = function(b){
 	var self = this;
-	
+
 	if (b)
 	  imagestream.write.call(this,b);
 
@@ -98,7 +98,7 @@ var ods = cv.ObjectDetectionStream.prototype;
 ods.write = function(m){
   var self = this;
 
-	this.classifier.detectMultiScale(m, 
+	this.classifier.detectMultiScale(m,
       function(e, objs){
         if (e) { throw e }
         self.emit('data', objs, m);
@@ -111,7 +111,7 @@ ods.write = function(m){
 cv.VideoStream = function(src){
   if (src instanceof cv.VideoCapture){
     this.video = src
-  } else { 
+  } else {
     this.video = new cv.VideoCapture(src);
   }
   this.readable = true;
@@ -128,7 +128,7 @@ videostream.read = function(){
   var self = this;
 
   var frame = function(){
-    self.video.read(function(mat){
+    self.video.read(function(err, mat){
       self.emit('data', mat)
       if (!self.paused){
         process.nextTick(frame)