--- sphinx/ext/autodoc.py	2008-09-22 20:09:53.000000000 +0200
+++ autodoc-new.py	2008-09-22 20:10:10.000000000 +0200
@@ -305,6 +305,7 @@
         if path:
             mod_cls = path
         else:
+            mod_cls = None
             # if documenting a class-level object without path, there must be a
             # current class, either from a parent auto directive ...
             if hasattr(env, 'autodoc_current_class'):