diff --git a/static/index.html b/static/index.html
index b3e3b809d..abbfbb7bf 100644
--- a/static/index.html
+++ b/static/index.html
@@ -9,6 +9,10 @@
       try {
         require('coffee-script');
         require('coffee-cache').setCacheDir('/tmp/atom-coffee-cache');
+        Object.defineProperty(require.extensions, '.coffee', {
+          writable: false,
+          value: require.extensions['.coffee']
+        });
         require(currentWindow.loadSettings.bootstrapScript);
         currentWindow.emit('window:loaded');
       }