diff --git a/lib/caronte/streams/proxy.js b/lib/caronte/streams/proxy.js
index 10afdae..5112b43 100644
--- a/lib/caronte/streams/proxy.js
+++ b/lib/caronte/streams/proxy.js
@@ -12,6 +12,8 @@ function ProxyStream() {
   this.once('finish', function() { self.onFinish(); }); 
 }
 
+require('util').inherits(ProxyStream, Duplex);
+
 ProxyStream.prototype.onPipe = function(request) {
   var self = this;
 
@@ -43,4 +45,3 @@ ProxyStream.prototype._read = function(size) {
   this.push(chunk);
 };
 
-require('util').inherits(ForwardStream, Duplex);
\ No newline at end of file