diff --git a/lib/net.js b/lib/net.js
index 4b2622be0d..3c58de2837 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -667,7 +667,7 @@ Socket.prototype.__defineGetter__('bytesWritten', function() {
       encoding = this._pendingEncoding;
 
   state.buffer.forEach(function(el) {
-    bytes += Buffer.byteLength(el.chunk);
+    bytes += Buffer.byteLength(el.chunk, el.encoding);
   });
 
   if (data)