diff --git a/lib/less/index.js b/lib/less/index.js
index a74f4242..368f7d56 100644
--- a/lib/less/index.js
+++ b/lib/less/index.js
@@ -106,14 +106,14 @@ less.Parser.importer = function (file, paths, callback, env) {
 
     if (pathname) {
         fs.readFile(pathname, 'utf-8', function(e, data) {
-          if (e) sys.error(e);
+            if (e) return callback(e);
 
-          new(less.Parser)({
-              paths: [path.dirname(pathname)].concat(paths),
-              filename: pathname
-          }).parse(data, function (e, root) {
-              callback(e, root, data);
-          });
+            new(less.Parser)({
+                paths: [path.dirname(pathname)].concat(paths),
+                filename: pathname
+            }).parse(data, function (e, root) {
+                callback(e, root, data);
+            });
         });
     } else {
         if (typeof(env.errback) === "function") {