diff --git a/railties/guides/source/asset_pipeline.textile b/railties/guides/source/asset_pipeline.textile
index 91285eec6c..4a1c623436 100644
--- a/railties/guides/source/asset_pipeline.textile
+++ b/railties/guides/source/asset_pipeline.textile
@@ -326,33 +326,32 @@ TODO: Apache instructions
 
 h3. Customizing The Pipeline
 
-h4. CSS
 
-There is currently one option for processing CSS - SCSS. This Gem extends the CSS syntax and offers minification.
+h4. CSS Compression
 
-The following line will enable SCSS in you project.
+There is currently one option for compressing CSS - YUI. This Gem extends the CSS syntax and offers minification.
+
+The following line will enable YUI compression, and requires the +yui-compressor+ gem.
 
 <erb>
-config.assets.css_compressor = :scss
+config.assets.css_compressor = :yui
 </erb>
 
-This option is for compression only and does not relate to the SCSS language extensions that apply when using the +.scss+ file extension on CSS assets.
+The +config.assets.compress+ must be set to +true+ to enable CSS compression
 
 h4. Javascript
 
-There are three options available to process javascript - uglifier, closure and yui.
+Possible options for Javascript compression are +:closure+, +:uglifier+ and +:yui+. These require the use of the +closure-compiler+, +uglifier+ or +yui-compressor+ gems respectively.
 
 The default Gemfile includes "uglifier":https://github.com/lautis/uglifier. This gem wraps "UglifierJS":https://github.com/mishoo/UglifyJS (written for NodeJS) in Ruby. It compress your code by removing white spaces and other magical things like changing your if and else statements to ternary operators when possible.
 
-TODO: Add detail about the other two
-
 The following line will invoke uglifier for Javascript compression.
 
 <erb>
 config.assets.js_compressor  = :uglifier
 </erb>
 
-
+The +config.assets.compress+ must be set to +true+ to enable Javascript compression
 
 h4. Using your own compressor
 
@@ -418,3 +417,4 @@ h3. Making Your Library or Gem a Pre-Processor
 "You should be able to register [your gems] on "Tilt":Tilt and Sprockets will find them." - Josh
 [Tilt]https://github.com/rtomayko/tilt
 
+
diff --git a/railties/guides/source/configuring.textile b/railties/guides/source/configuring.textile
index 8e6010ff79..7ed958be08 100644
--- a/railties/guides/source/configuring.textile
+++ b/railties/guides/source/configuring.textile
@@ -120,10 +120,12 @@ h4. Configuring Assets
 
 Rails 3.1, by default, is set up to use the +sprockets+ gem to manage assets within an application. This gem concatenates and compresses assets in order to make serving them much less painful.
 
-* +config.assets.css_compressor+ defines the CSS compressor to use. Only supported value at the moment is +:yui+, which uses the +yui-compressor+ gem.
-
 * +config.assets.enabled+ a flag that controls whether the asset pipeline is enabled. It is explicitly initialized in +config/application.rb+.
 
+* +config.assets.compress+ a flag that enables the compression of compiled assets. It is explicitly set to true in +config/production.rb+.
+
+* +config.assets.css_compressor+ defines the CSS compressor to use. Only supported value at the moment is +:yui+, which uses the +yui-compressor+ gem.
+
 * +config.assets.js_compressor+ defines the JavaScript compressor to use. Possible values are +:closure+, +:uglifier+ and +:yui+ which require the use of the +closure-compiler+, +uglifier+ or +yui-compressor+ gems respectively.
 
 * +config.assets.paths+ contains the paths which are used to look for assets. Appending paths to this configuration option will cause those paths to be used in the search for assets.