diff --git a/src/js/sha256.js b/src/js/sha256.js
index fc0aef02..cc82d8ce 100644
--- a/src/js/sha256.js
+++ b/src/js/sha256.js
@@ -23,7 +23,7 @@
  * @license MIT
  */
 /*jslint bitwise: true */
-(function () {
+var sha256 = (function () {
 	'use strict';
 
 	var ERROR = 'input is invalid type';
@@ -520,15 +520,5 @@
 	exports.sha256.hmac = createHmacMethod();
 	exports.sha224.hmac = createHmacMethod(true);
 
-	if (COMMON_JS) {
-	  module.exports = exports;
-	} else {
-	  root.sha256 = exports.sha256;
-	  root.sha224 = exports.sha224;
-	  if (AMD) {
-		define(function () {
-		  return exports;
-		});
-	  }
-	}
+	return exports.sha256;
   })();