diff --git a/app/models/fragment_expiration.rb b/app/models/fragment_expiration.rb
index 1f312829..8d14a8f6 100644
--- a/app/models/fragment_expiration.rb
+++ b/app/models/fragment_expiration.rb
@@ -4,14 +4,14 @@ module FragmentExpiration
   delegate :expire_fragment, :to => :controller
   
   def expire_fragment_in_all_locales(key)
-    I18n.available_locales.each do |locale|
+    I18n.usable_locales.each do |locale|
       localized_key = localize_fragment_key(key, locale)
       expire_fragment(localized_key)
     end
   end
 
   def expire_key_in_all_locales(key)
-    I18n.available_locales.each do |locale|
+    I18n.usable_locales.each do |locale|
       localized_key = localize_fragment_key(key, locale)
       Rails.cache.delete(localized_key)
     end