diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp
index 8ebd9ed6..7dc4c1c6 100644
--- a/Transceiver52M/Transceiver.cpp
+++ b/Transceiver52M/Transceiver.cpp
@@ -657,10 +657,10 @@ void Transceiver::reset()
 }
 
 
+#define MAX_PACKET_LENGTH 100
+
 void Transceiver::driveControl(size_t chan)
 {
-  int MAX_PACKET_LENGTH = 100;
-
   // check control socket
   char buffer[MAX_PACKET_LENGTH];
   int msgLen = -1;