diff --git a/lib/bundle.js b/lib/bundle.js
index e4dc08e..64dd201 100644
--- a/lib/bundle.js
+++ b/lib/bundle.js
@@ -61,7 +61,7 @@ function bundle (input, complete) {
 
         },
         filter: function (id) {
-          if ([ 'nexeres', 'sys' ].indexOf(id) > -1) { return false; }
+          if ([ 'nexeres', 'sys', 'readline' ].indexOf(id) > -1) { return false; }
           return !~builtins.indexOf(id);
         },
         extensions: [ '.js', '.json' ],