diff --git a/src/Features/build.js b/src/Features/build.js
index 1e5d21f..e27d3ef 100644
--- a/src/Features/build.js
+++ b/src/Features/build.js
@@ -7,6 +7,7 @@ modernizr.build(featureList, function (result)
 {
     result = result.replace(';(function(window, document, undefined){', '')
                    .replace('window.Modernizr = Modernizr;', '')
+                   .replace('\'enableClasses\': true', '\'enableClasses\': false')
                    .replace('testRunner();', 'Modernizr.testRunner = testRunner;')
                    .replace('})(window, document);', '');
     result += '\nmodule.exports = Modernizr;';
diff --git a/src/Features/modernizr.js b/src/Features/modernizr.js
index 6935488..6293cb6 100644
--- a/src/Features/modernizr.js
+++ b/src/Features/modernizr.js
@@ -42,7 +42,7 @@
     // can go in here as configuration.
     _config: {
       'classPrefix': '',
-      'enableClasses': true,
+      'enableClasses': false,
       'enableJSClass': true,
       'usePrefixes': true
     },