--- D:/Ruby/ruby-2.1.8-i386-mingw32/lib/ruby/2.1.0/win32/registry.rb.original Tue Jan 12 05:21:04 2016
+++ D:/Ruby/ruby-2.1.8-i386-mingw32/lib/ruby/2.1.0/win32/registry.rb    Mon Apr  4 08:17:45 2016

@@ -321,11 +321,11 @@ For detail, see the MSDN[http://msdn.microsoft.com

       end
 
       def DeleteValue(hkey, name)
-        check RegDeleteValue.call(hkey, make_wstr(name))
+        check RegDeleteValueW.call(hkey, make_wstr(name))
       end
 
       def DeleteKey(hkey, name)
-        check RegDeleteKey.call(hkey, make_wstr(name))
+        check RegDeleteKeyW.call(hkey, make_wstr(name))
       end
 
       def FlushKey(hkey)