diff --git a/lib/jekyll-haml/ext/convertible.rb b/lib/jekyll-haml/ext/convertible.rb
index 618fe71..c6a06a2 100644
--- a/lib/jekyll-haml/ext/convertible.rb
+++ b/lib/jekyll-haml/ext/convertible.rb
@@ -9,7 +9,7 @@ def initialize(*args)
     end
 
     def transform
-      _renderer.convert(content)
+      renderer.convert(content)
     end
 
     def extname