diff --git a/socketio/sgunicorn.py b/socketio/sgunicorn.py
index 236941d..b192faa 100644
--- a/socketio/sgunicorn.py
+++ b/socketio/sgunicorn.py
@@ -192,4 +192,4 @@ class NginxGeventSocketIOWorker(GeventSocketIOWorker):
     Nginx is not compatible with websockets and therefore will not add the
     wsgi.websocket key to the wsgi environment.
     """
-    transports = ['xhr-polling']
+    transports = ['websocket']