diff --git a/src/z3c/jbot/patches.py b/src/z3c/jbot/patches.py
index 1974f09..383337b 100644
--- a/src/z3c/jbot/patches.py
+++ b/src/z3c/jbot/patches.py
@@ -128,7 +128,7 @@ def get_and_bind(template, view=None, cls=None):
 
     def get_skin_obj(obj, view=None, cls=None):
         layer = utility.getLayer()
-        key = layer, obj.filename
+        key = layer, obj.getPhysicalPath()
         inst = registry.get(key)
         if inst is None:
             cls = obj.__class__