diff --git a/posts/build_a_blog.md b/posts/build_a_blog.md
index 8ab68c7..b588bb4 100644
--- a/posts/build_a_blog.md
+++ b/posts/build_a_blog.md
@@ -387,7 +387,7 @@ def render_post(fpath):
     ...
 	out = markdown.markdown('# ' + title) + out
     logging.info("writing to %s", destpath)
-	render_template('index.html.tmpl', destpath, html)
+	render_template('index.html.tmpl', destpath, out)
 ```
 
 After running you should see the each `post/*.html` file where each post file uses the full index template and includes each generated post HTML.