diff --git a/lib/websocket_rails/connection_adapters/web_socket.rb b/lib/websocket_rails/connection_adapters/web_socket.rb
index 329f0c57..c968e8b7 100644
--- a/lib/websocket_rails/connection_adapters/web_socket.rb
+++ b/lib/websocket_rails/connection_adapters/web_socket.rb
@@ -12,6 +12,7 @@ def initialize(request, dispatcher)
         @connection.onmessage = method(:on_message)
         @connection.onerror   = method(:on_error)
         @connection.onclose   = method(:on_close)
+        @connection.rack_response
         EM.next_tick do
           on_open
         end