diff --git a/guides/rails_guides/markdown/renderer.rb b/guides/rails_guides/markdown/renderer.rb
index 64475266cb..497e8076a6 100644
--- a/guides/rails_guides/markdown/renderer.rb
+++ b/guides/rails_guides/markdown/renderer.rb
@@ -68,7 +68,7 @@ module RailsGuides
 
         def lexer_language(code_type)
           case code_type
-          when "js", "html", "ruby", "sql", "yaml"
+          when "css", "js", "html", "ruby", "sql", "yaml"
             code_type
           when "erb", "html+erb"
             "erb"
diff --git a/guides/source/api_app.md b/guides/source/api_app.md
index 06b84a7bfc..19ba7c5dbd 100644
--- a/guides/source/api_app.md
+++ b/guides/source/api_app.md
@@ -315,7 +315,7 @@ and specify the `Content-Type` as `application/json`.
 
 Here's an example in jQuery:
 
-```javascript
+```js
 jQuery.ajax({
   type: 'POST',
   url: '/people',