diff --git a/src/Devristo/Phpws/Protocol/WebSocketTransportHybi.php b/src/Devristo/Phpws/Protocol/WebSocketTransportHybi.php
index 4740f0b..29eea9a 100644
--- a/src/Devristo/Phpws/Protocol/WebSocketTransportHybi.php
+++ b/src/Devristo/Phpws/Protocol/WebSocketTransportHybi.php
@@ -170,7 +170,7 @@ protected function processControlFrame(WebSocketFrame $frame)
                 $this->_socket->close();
                 break;
             case WebSocketOpcode::PingFrame :
-                $frame = WebSocketFrame::create(WebSocketOpcode::PongFrame);
+                $frame = WebSocketFrame::create(WebSocketOpcode::PongFrame, $frame->getData());
                 $this->sendFrame($frame);
                 break;
         }