diff --git a/app/models/site_customization.rb b/app/models/site_customization.rb
index b39230d4eb6..385c1de926e 100644
--- a/app/models/site_customization.rb
+++ b/app/models/site_customization.rb
@@ -144,7 +144,7 @@ class SiteCustomization < ActiveRecord::Base
   end
 
   def self.link_css_tag(href)
-    # href = (GlobalSetting.cdn_url || "") + href
+    href = (GlobalSetting.cdn_url || "") + "#{href}&__ws=#{Discourse.current_hostname}"
     %Q{<link class="custom-css" rel="stylesheet" href="#{href}" type="text/css" media="all">}.html_safe
   end
 end