diff --git a/publicsuffixlist.js b/publicsuffixlist.js
index 6a8fbe8..4eb865a 100644
--- a/publicsuffixlist.js
+++ b/publicsuffixlist.js
@@ -301,7 +301,7 @@ function fromSelfie(selfie) {
 
 root = root || window;
 
-module.exports = {
+root.publicSuffixList = {
     'version': '1.0',
     'parse': parse,
     'getDomain': getDomain,
@@ -310,7 +310,11 @@ module.exports = {
     'fromSelfie': fromSelfie
 };
 
-root.publicSuffixList = module.exports;
+if ( typeof module !== "undefined" ) { 
+    module.exports = root.publicSuffixList;
+} else if ( typeof exports !== "undefined" ) {
+    exports = root.publicSuffixList;
+}
 
 /******************************************************************************/