diff --git a/lib/less/index.js b/lib/less/index.js
index 6eea8c72..ebcfd0db 100644
--- a/lib/less/index.js
+++ b/lib/less/index.js
@@ -21,7 +21,7 @@ var less = {
 
         if (callback) {
             parser.parse(input, function (e, root) {
-                callback(e, root.toCSS());
+                callback(e, root.toCSS(options));
             });
         } else {
             ee = new(require('events').EventEmitter);
@@ -29,7 +29,7 @@ var less = {
             process.nextTick(function () {
                 parser.parse(input, function (e, root) {
                     if (e) { ee.emit('error', e) }
-                    else   { ee.emit('success', root.toCSS()) }
+                    else   { ee.emit('success', root.toCSS(options)) }
                 });
             });
             return ee;