diff --git a/build/rhino-modules.js b/build/rhino-modules.js
index f9c9945a..260a866a 100644
--- a/build/rhino-modules.js
+++ b/build/rhino-modules.js
@@ -45,7 +45,7 @@
         join: function() {
             var parts = [];
             for (i in arguments) {
-                parts = parts.concat(arguments[i].split('/'));
+                parts = parts.concat(arguments[i].split(/\/|\\/));
             }
             var result = [];
             for (i in parts) {