diff --git a/Ymodem.cpp b/Ymodem.cpp
index 4492554..0f1cf7c 100644
--- a/Ymodem.cpp
+++ b/Ymodem.cpp
@@ -265,6 +265,7 @@ Ymodem::Code Ymodem::receivePacket()
   {
     if(read(&(rxBuffer[0]), 1) > 0)
     {
+      BOOST_LOG_TRIVIAL(debug) << "RX = " << int(rxBuffer[0]);
       if(rxBuffer[0] == CodeSoh)
       {
         uint32_t len = read(&(rxBuffer[1]), YMODEM_PACKET_SIZE + YMODEM_PACKET_OVERHEAD - 1);