diff --git a/src/PacketSerial.h b/src/PacketSerial.h
index a4b1333..b3c6ecc 100644
--- a/src/PacketSerial.h
+++ b/src/PacketSerial.h
@@ -121,6 +121,7 @@ class PacketSerial_
                                                     size, 
                                                     _encodeBuffer);
 
+            _serial->write(PacketMarker);
             _serial->write(_encodeBuffer, numEncoded);
             _serial->write(PacketMarker);
     }