diff --git a/operating_system.rb b/operating_system.rb
index 0d4b1f0..d95b303 100644
--- a/operating_system.rb
+++ b/operating_system.rb
@@ -119,6 +119,7 @@ module Gem
     def default_path
       path = default_dirs.collect {|location, paths| paths[:gem_dir]}
       path.unshift Gem.user_dir if File.exist? Gem.user_home
+      path
     end
 
     def default_ext_dir_for base_dir