diff --git a/lib/marked.js b/lib/marked.js
index 1ddf7580..83b2e6ed 100644
--- a/lib/marked.js
+++ b/lib/marked.js
@@ -967,6 +967,8 @@ marked.parse = marked;
 
 if (typeof module !== 'undefined') {
   module.exports = marked;
+} else if(typeof define === 'function' && define.amd) {
+  define(function() { return marked; });
 } else {
   this.marked = marked;
 }