diff --git a/guides/rails_guides/markdown/renderer.rb b/guides/rails_guides/markdown/renderer.rb
index 554d94ad50..73ca600361 100644
--- a/guides/rails_guides/markdown/renderer.rb
+++ b/guides/rails_guides/markdown/renderer.rb
@@ -16,7 +16,7 @@ HTML
       end
 
       def header(text, header_level)
-        # Always increase the heading level by, so we can use h1, h2 heading in the document
+        # Always increase the heading level by 1, so we can use h1, h2 heading in the document
         header_level += 1
 
         %(<h#{header_level}>#{text}</h#{header_level}>)