uninitialized constant Rake::DSL

I’ve found this error upgrading to redmine 1.4.4

# rake config/initializers/session_store.rb
(in /var/www/redmine)
rake aborted!
uninitialized constant Rake::DSL
/var/www/redmine/Rakefile:14:in `require'
(See full trace by running task with --trace)

To avoid the error add the following to the top of the RakeFile:

module Rake
  module DSL
  end
end