diff --git a/c3.js b/c3.js
index e17658f..eb87b77 100644
--- a/c3.js
+++ b/c3.js
@@ -7222,7 +7222,7 @@
     }
 
     if (typeof define === 'function' && define.amd) {
-        define("c3", ["d3"], c3);
+        define("c3", ["d3"], function () { return c3; });
     } else if ('undefined' !== typeof exports && 'undefined' !== typeof module) {
         module.exports = c3;
     } else {