diff --git a/cms/sites/__init__.py b/cms/sites/__init__.py
index 28553d4..f1bdcd4 100644
--- a/cms/sites/__init__.py
+++ b/cms/sites/__init__.py
@@ -474,7 +474,7 @@ class Site(Initialization) :
         :mode   r,rb {text,binary}
         """
         _mode  = 'r' if 'mode' not in _args else _args['mode']
-        _uri = _args['uri']
+        _uri = _args['uri'].replace('/',os.sep) #-- windows has some issues
 
         if _uri.endswith('.py') and '_plugins' in _uri and self.get('layout.root') not in _uri:
             #