diff --git a/readable.js b/readable.js
index <HASH>..<HASH> 100644
--- a/readable.js
+++ b/readable.js
@@ -1 +1,6 @@
-module.exports = require("./lib/_stream_readable.js")
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
Exports more like require('stream') in <I>