diff --git a/voussoirkit/pathclass.py b/voussoirkit/pathclass.py
index 0bad1e3..9a96200 100644
--- a/voussoirkit/pathclass.py
+++ b/voussoirkit/pathclass.py
@@ -4,6 +4,7 @@ import re
 
 from voussoirkit import winglob
 
+WINDOWS_BADCHARS = {'\\', '/', ':', '*', '?', '<', '>', '|', '"'}
 
 class PathclassException(Exception):
     pass