diff --git a/lib/less/parser.js b/lib/less/parser.js
index a6712c22..e8d83629 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -3,8 +3,8 @@ var less, tree;
 if (typeof environment === "object" && ({}).toString.call(environment) === "[object Environment]") {
     // Rhino
     // Details on how to detect Rhino: https://github.com/ringo/ringojs/issues/88
-    if (typeof(window) === 'undefined') { window.less = {} }
-    less = window.less || {};
+    if (typeof(window) != 'undefined') { window.less = {} }
+    less = typeof(window) != 'undefined' ? window.less : {};
     tree = less.tree = {};
     less.mode = 'rhino';
 } else if (typeof(window) === 'undefined') {