diff --git a/YmodemFileReceive.cpp b/YmodemFileReceive.cpp
index ead9a36..99b85d5 100644
--- a/YmodemFileReceive.cpp
+++ b/YmodemFileReceive.cpp
@@ -111,6 +111,8 @@ void YmodemFileReceive::writeTimeOut(const boost::system::error_code& e)
 
 Ymodem::Code YmodemFileReceive::callback(Status status, uint8_t *buff, uint32_t *len)
 {
+    BOOST_LOG_TRIVIAL(debug) << "Callback status: " << status;
+
     switch(status)
     {
         case StatusEstablish: