diff --git a/lib/less/parser.js b/lib/less/parser.js
index b5299a5..40f9000 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -1038,9 +1038,7 @@ if (typeof(window) !== 'undefined') {
         if (path[0] !== '/' && paths.length > 0) {
             path = paths[0] + path;
         }
-        loadStyleSheet({ href: path, title: path }, function (root) {
-            callback(root);
-        });
+        loadStyleSheet({ href: path, title: path }, callback, true);
     };
 }