diff --git a/addons/document_webdav/dav_fs.py b/addons/document_webdav/dav_fs.py
index 9b36a7d78dd..2ee305d2e2b 100644
--- a/addons/document_webdav/dav_fs.py
+++ b/addons/document_webdav/dav_fs.py
@@ -79,6 +79,7 @@ class openerp_dav_handler(dav_interface):
             return props
         node = self.uri2object(cr, uid, pool, uri2)
         if node:
+            props = props.copy()
             props.update(node.get_dav_props(cr))
         cr.close()     
         return props