diff --git a/ruby/msgpack.gemspec b/ruby/msgpack.gemspec
index 117f058b..4f7fcec4 100644
--- a/ruby/msgpack.gemspec
+++ b/ruby/msgpack.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.rubyforge_project = "msgpack"
   s.has_rdoc = false
   s.extra_rdoc_files = ["README", "ChangeLog", "AUTHORS"]
-  s.require_paths = ["ext"]
+  s.require_paths = ["lib"]
   s.files = Dir["ext/**/*", "msgpack/**/*", "test/**/*"]
   s.test_files = Dir["test/test_*.rb"]
   s.extensions = Dir["ext/**/extconf.rb"]
diff --git a/ruby/test/test_helper.rb b/ruby/test/test_helper.rb
index 3088faa9..6a634893 100644
--- a/ruby/test/test_helper.rb
+++ b/ruby/test/test_helper.rb
@@ -1,3 +1,3 @@
 require 'test/unit'
-require File.dirname(__FILE__) + '/../ext/msgpack'
+require File.dirname(__FILE__) + '/../lib/msgpack'