diff --git a/flask_sockets.py b/flask_sockets.py
index ff288e5..0b74dc0 100644
--- a/flask_sockets.py
+++ b/flask_sockets.py
@@ -37,6 +37,7 @@ class SocketMiddleware(object):
             environment = environ['wsgi.websocket']
 
             handler(environment)
+            return []
         else:
             return self.app(environ, start_response)
 
@@ -64,4 +65,4 @@ class Sockets(object):
 
 # CLI sugar.
 if 'Worker' in locals():
-    worker = Worker
\ No newline at end of file
+    worker = Worker