diff --git a/lib/mess/index.js b/lib/mess/index.js
index 8ee0adf..6cea254 100644
--- a/lib/mess/index.js
+++ b/lib/mess/index.js
@@ -8,6 +8,7 @@ var mess = {
     version: [1, 0, 40],
     Parser: require('mess/parser').Parser,
     Renderer: require('mess/renderer').Renderer,
+    External: require('mess/external'),
     importer: require('mess/parser').importer,
     tree: require('mess/tree'),
     writeError: function(ctx, options) {