diff --git a/lib/windows_error.rb b/lib/windows_error.rb
index 826fec6..0e41b2d 100644
--- a/lib/windows_error.rb
+++ b/lib/windows_error.rb
@@ -1,4 +1,8 @@
-require 'windows_error/version'
 require 'windows_error/error_code'
+require 'windows_error/win32'
+require 'windows_error/nt_status'
+require 'windows_error/h_result'
+require 'windows_error/version'
+
 module WindowsError
 end