diff --git a/websocket.py b/websocket.py
index 0250119..6d4e72b 100644
--- a/websocket.py
+++ b/websocket.py
@@ -547,7 +547,7 @@ class WebSocket(object):
                 self.send_close()
                 return (frame.opcode, None)
             elif frame.opcode == ABNF.OPCODE_PING:
-                self.pong("Hi!")
+                self.pong(frame.data)
 
 
     def recv_frame(self):