diff --git a/src/kiss_processor.cpp b/src/kiss_processor.cpp
index e66c346..7e7fb1b 100644
--- a/src/kiss_processor.cpp
+++ b/src/kiss_processor.cpp
@@ -66,12 +66,6 @@ void Processor::queueRigToSerial(Cmd cmd, const byte *packet, int packetLength)
 void Processor::queueSerialToRig(Cmd cmd, const byte *packet, int packetLength) {
   bool result = 1;
   if (disableKiss_) {
-    // inject proprietary identifier
-    if (usePrefix3_) {
-      result &= serialToRigQueue_.unshift('<');
-      result &= serialToRigQueue_.unshift(0xff);
-      result &= serialToRigQueue_.unshift(0x01);
-    }
     // TNC2, send as is, receiveByteRaw will deal with it
     for (int i = 0; i < packetLength; i++) {
       byte rxByte = packet[i];