[deprecation] fix class_renamed() on old-style classes

1 files changed, 2 insertions, 1 deletions

diff --git a/deprecation.py b/deprecation.py
index 9ceff17..1c81b63 100644
--- a/deprecation.py
+++ b/deprecation.py
@@ -125,11 +125,12 @@ class DeprecationManager(object):
             return self.class_deprecated(version)(old_name, (new_class,), clsdict)
         except (NameError, TypeError):
             # old-style class
+            warn = self.warn
             class DeprecatedClass(new_class):
                 """FIXME: There might be a better way to handle old/new-style class
                 """
                 def __init__(self, *args, **kwargs):
-                    self.warn(version, message, stacklevel=3)
+                    warn(version, message, stacklevel=3)
                     new_class.__init__(self, *args, **kwargs)
             return DeprecatedClass