diff --git a/radio/src/bluetooth.cpp b/radio/src/bluetooth.cpp
index 26397fc4c..e19547912 100644
--- a/radio/src/bluetooth.cpp
+++ b/radio/src/bluetooth.cpp
@@ -219,7 +219,7 @@ void Bluetooth::processTrainerByte(uint8_t data)
       crc ^= buffer[i];
     }
     if (crc == buffer[BLUETOOTH_PACKET_SIZE-1]) {
-      if (buffer[0] == 0x80) {
+      if (buffer[0] == TRAINER_FRAME) {
         processTrainerFrame(buffer);
       }
     }
@@ -249,7 +249,7 @@ void Bluetooth::sendTrainer()
   crc = 0x00;
 
   buffer[bufferIndex++] = START_STOP; // start byte
-  pushByte(0x80); // trainer frame type?
+  pushByte(TRAINER_FRAME);
   for (int channel=0; channel<lastCh; channel+=2, cur+=3) {
     uint16_t channelValue1 = PPM_CH_CENTER(channel) + limit((int16_t)-PPM_range, channelOutputs[channel], (int16_t)PPM_range) / 2;
     uint16_t channelValue2 = PPM_CH_CENTER(channel+1) + limit((int16_t)-PPM_range, channelOutputs[channel+1], (int16_t)PPM_range) / 2;