diff --git a/lib/caching_stuff.rb b/lib/caching_stuff.rb
index 54634a47..fc7750eb 100644
--- a/lib/caching_stuff.rb
+++ b/lib/caching_stuff.rb
@@ -8,7 +8,7 @@ module CachingStuff
     module Caching
       module Fragments
         def fragment_cache_key(key)
-          ActiveSupport::Cache.expand_cache_key(key.is_a?(Hash) ? url_for(key.merge(:host=>"")).split(":///").last : key.split('/')[1..-1].join('/'), :views)
+          ActiveSupport::Cache.expand_cache_key(key.is_a?(Hash) ? url_for(key.merge(:host=>"")).split(":///").last : key.split('/')[1..-1].join('/').gsub(/\?format=.*/,''), :views)
         end
       end
     end