diff --git a/nova/wsgi.py b/nova/wsgi.py
index d52bf855d..096d5843f 100644
--- a/nova/wsgi.py
+++ b/nova/wsgi.py
@@ -221,7 +221,7 @@ class Controller(object):
         MIME types to information needed to serialize to that type.
         """
         _metadata = getattr(type(self), "_serialization_metadata", {})
-        serializer = wsgi.Serializer(request.environ, _metadata)
+        serializer = Serializer(request.environ, _metadata)
         return serializer.to_content_type(data)