Cannot reopen a class from an included module

module Mod
  class Foo
    def foo
      puts "foo"
    end
  end
end

include Mod

class Foo
  def bar
    puts "bar"
  end
end

f = Foo.new
f.bar
f.foo

Results from running the above script with Ruby and JRuby:

$ ruby -v
ruby 1.8.6 (2008-03-03 patchlevel 114) [universal-darwin9.0]
$ jruby -v
jruby 1.1.7 (ruby 1.8.6 patchlevel 114) (2009-01-07 rev 6586) [i386-java]
$ ruby test.rb
bar
foo
$ jruby test.rb
bar
test.rb:19: undefined method `foo' for #<Foo:0xbd9256> (NoMethodError)

Reopening the Foo class as Mod::Foo works. From what I've seen, RubyModule.getConstantAt can't locate the included class (called from defineOrGetClassUnder) whereas RubyModule.getConstantNoConstMissing can.