diff --git a/config/application.rb b/config/application.rb
index 5aec70374..ac74f1238 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -109,6 +109,12 @@ class Application < Rails::Application
     # Path within public/ where assets are compiled to
     config.assets.prefix = "/assets/government-frontend"
 
+    # Using a sass css compressor causes a scss file to be processed twice
+    # (once to build, once to compress) which breaks the usage of "unquote"
+    # to use CSS that has same function names as SCSS such as max.
+    # https://github.com/alphagov/govuk-frontend/issues/1350
+    config.assets.css_compressor = nil
+
     # allow overriding the asset host with an enironment variable, useful for
     # when router is proxying to this app but asset proxying isn't set up.
     config.asset_host = ENV["ASSET_HOST"]
diff --git a/config/environments/production.rb b/config/environments/production.rb
index a6e3061b6..dc3bab9a2 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -28,6 +28,10 @@
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
+  # Rather than use a CSS compressor, use the SASS style to perform compression.
+  config.sass.style = :compressed
+  config.sass.line_comments = false
+
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = 'http://assets.example.com'