circular dependancy

inject.js

@@ -1,6 +1,6 @@
 var sign = require('./sign');
 var verify = require('./verify');
-var Writable = require('readable-stream').Writable;
+var stream = require('readable-stream');
 var inherits = require('inherits');
 var algos = require('./algos');
 'use strict';
@@ -15,17 +15,17 @@ module.exports = function (exports, crypto) {
 		return new Verify(algorithm, crypto);
 	}
 };
-inherits(Sign, Writable);
+inherits(Sign, stream.Writable);
 function Sign(algorithm, crypto) {
-	Writable.call(this);
+	stream.Writable.call(this);
 	var data = algos[algorithm];
 	if (!data) {
 		throw new Error('Unknown message digest');
 	}
 	this._hash = crypto.createHash(data.hash);
 	this._tag = data.id;
 	this._crypto = crypto;
-};
+}
 Sign.prototype._write = function _write(data, _, done) {
 	this._hash.update(data);
 	done();
@@ -45,16 +45,16 @@ Sign.prototype.sign = function signMethod(key, enc) {
 	return sig;
 };
 
-inherits(Verify, Writable);
+inherits(Verify, stream.Writable);
 function Verify(algorithm, crypto) {
-	Writable.call(this);
+	stream.Writable.call(this);
 	var data = algos[algorithm];
 	if (!data) {
 		throw new Error('Unknown message digest');
 	}
 	this._hash = crypto.createHash(data.hash);
 	this._tag = data.id;
-};
+}
 Verify.prototype._write = function _write(data, _, done) {
 	this._hash.update(data);
 	done();