diff --git a/lib/redmine/i18n.rb b/lib/redmine/i18n.rb
index 3e78317..4b8dc21 100644
--- a/lib/redmine/i18n.rb
+++ b/lib/redmine/i18n.rb
@@ -99,7 +99,7 @@ module Redmine
           map {|lang| [ll(lang.to_s, :general_lang_name), lang.to_s]}.
           sort {|x,y| x.first <=> y.first }
       else
-        ActionController::Base.cache_store.fetch "i18n/languages_options" do
+        ActionController::Base.cache_store.fetch "i18n/languages_options/#{Redmine::VERSION}" do
           languages_options :cache => false
         end
       end