diff --git a/lib/less/browser.js b/lib/less/browser.js
index c5d16805..807890a3 100644
--- a/lib/less/browser.js
+++ b/lib/less/browser.js
@@ -7,11 +7,17 @@ for (var i = 0; i < sheets.length; i++) {
     (function (sheet) { // Because the functions here are async, we need to create a closure
         xhr(sheet.href, function (data) {
             new(less.Parser)({ optimization: 3 }).parse(data, function (e, root) {
-                var css = document.createElement('style');
+                var css = document.createElement('style'), styles;
                 css.type = 'text/css';
                 css.media = 'screen';
                 css.title = sheet.title || sheet.href.match(/\/([-\w]+)\.[a-z]+$/i)[1];
-                css.innerHTML = root.toCSS();
+                styles = root.toCSS();
+
+                if (css.styleSheet) {
+                    css.styleSheet.cssText = styles;
+                } else {
+                    css.appendChild(document.createTextNode(styles));
+                }
                 document.getElementsByTagName('head')[0].appendChild(css);
             });
         });
diff --git a/lib/less/tree.js b/lib/less/tree.js
index c5572880..a1d4878c 100644
--- a/lib/less/tree.js
+++ b/lib/less/tree.js
@@ -1,4 +1,4 @@
-var tree = exports;
+if (typeof(require) !== 'undefined') { var tree = exports }
 
 tree.find = function (obj, fun) {
     for (var i = 0, r; i < obj.length; i++) {