diff --git a/src/css-layout.js b/src/css-layout.js
index 0f24f5cb..95283509 100644
--- a/src/css-layout.js
+++ b/src/css-layout.js
@@ -2,7 +2,7 @@
 // See https://github.com/umdjs/umd for reference
 //
 // This file uses the following specific UMD implementation:
-// https://github.com/umdjs/umd/blob/master/returnExports.js
+// https://github.com/umdjs/umd/blob/master/templates/returnExports.js
 (function(root, factory) {
   if (typeof define === 'function' && define.amd) {
     // AMD. Register as an anonymous module.