diff --git a/lib/markdown.js b/lib/markdown.js
index <HASH>..<HASH> 100644
--- a/lib/markdown.js
+++ b/lib/markdown.js
@@ -33,6 +33,8 @@ Object.defineProperty(helpers, 'markdown', {
     markdown = val;
   },
   get: function() {
+    // this is defined as a getter to avoid calling this function
+    // unless the helper is actually used
     return markdown || (markdown = require('helper-markdown')());
   }
 });
@@ -52,13 +54,4 @@ Object.defineProperty(helpers, 'markdown', {
  * @api public
  */
 
-Object.defineProperty(helpers, 'md', {
-  configurable: true,
-  enumerable: true,
-  set: function(val) {
-    md = val;
-  },
-  get: function() {
-    return md || (md = require('helper-md'));
-  }
-});
+helpers.md = require('helper-md');
add comments

also export the `md` helper directly