diff --git a/Gruntfile.js b/Gruntfile.js
index f931cadca..c684401aa 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -214,6 +214,14 @@ module.exports = function(grunt) {
           specs: 'test/browser/runner-global-vars-spec.js',
           outfile: 'tmp/browser/test-runner-global-vars.html'
         }
+      },
+      postProcessor: {
+        src: ['test/browser/less/postProcessor/*.less'],
+        options: {
+          helpers: 'test/browser/runner-postProcessor-options.js',
+          specs: 'test/browser/runner-postProcessor.js',
+          outfile: 'tmp/browser/test-postProcessor.html'
+        }
       }
     },
 
diff --git a/lib/less/browser.js b/lib/less/browser.js
index ffcf82fc1..f89eb9e83 100644
--- a/lib/less/browser.js
+++ b/lib/less/browser.js
@@ -159,6 +159,13 @@ function createCSS(styles, sheet, lastModified) {
     }
 }
 
+function postProcessCSS(styles) {
+    if (less.postProcessor && typeof less.postProcessor === 'function') {
+        styles = less.postProcessor.call(styles, styles) || styles;
+    }
+    return styles;
+}
+
 function errorHTML(e, rootHref) {
     var id = 'less-error-message:' + extractId(rootHref || "");
     var template = '<li><label>{line}</label><pre class="{class}">{content}</pre></li>';
@@ -575,7 +582,9 @@ function initRunningMode(){
                     if (e) {
                         error(e, sheet.href);
                     } else if (root) {
-                        createCSS(root.toCSS(less), sheet, env.lastModified);
+                        var styles = root.toCSS(less);
+                        styles = postProcessCSS(styles);
+                        createCSS(styles, sheet, env.lastModified);
                     }
                 });
             }
@@ -645,7 +654,9 @@ less.refresh = function (reload, modifyVars) {
             log("loading " + sheet.href + " from cache.", logLevel.info);
         } else {
             log("parsed " + sheet.href + " successfully.", logLevel.info);
-            createCSS(root.toCSS(less), sheet, env.lastModified);
+            var styles = root.toCSS(less);
+            styles = postProcessCSS(styles);
+            createCSS(styles, sheet, env.lastModified);
         }
         log("css for " + sheet.href + " generated in " + (new Date() - endTime) + 'ms', logLevel.info);
         if (env.remaining === 0) {
diff --git a/test/browser/css/postProcessor/postProcessor.css b/test/browser/css/postProcessor/postProcessor.css
new file mode 100644
index 000000000..76de30bd0
--- /dev/null
+++ b/test/browser/css/postProcessor/postProcessor.css
@@ -0,0 +1,4 @@
+hr {height:50px;}
+.test {
+  color: #ffffff;
+}
diff --git a/test/browser/less/postProcessor/postProcessor.less b/test/browser/less/postProcessor/postProcessor.less
new file mode 100644
index 000000000..0d4c0304d
--- /dev/null
+++ b/test/browser/less/postProcessor/postProcessor.less
@@ -0,0 +1,4 @@
+@color: white;
+.test {
+    color: @color;
+}
diff --git a/test/browser/runner-postProcessor-options.js b/test/browser/runner-postProcessor-options.js
new file mode 100644
index 000000000..94044da21
--- /dev/null
+++ b/test/browser/runner-postProcessor-options.js
@@ -0,0 +1,4 @@
+var less = {};
+less.postProcessor = function(styles) {
+    return 'hr {height:50px;}\n' + styles;
+};
diff --git a/test/browser/runner-postProcessor.js b/test/browser/runner-postProcessor.js
new file mode 100644
index 000000000..be9eb24bb
--- /dev/null
+++ b/test/browser/runner-postProcessor.js
@@ -0,0 +1,3 @@
+describe("less.js postProcessor", function() {
+  testLessEqualsInDocument();
+});