diff --git a/radio/src/targets/common/arm/stm32/bluetooth_driver.cpp b/radio/src/targets/common/arm/stm32/bluetooth_driver.cpp
index a7fa5a690..2a9e0848b 100644
--- a/radio/src/targets/common/arm/stm32/bluetooth_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/bluetooth_driver.cpp
@@ -20,8 +20,8 @@
 
 #include "opentx.h"
 
-Fifo<uint8_t, 64> btTxFifo;
-Fifo<uint8_t, 128> btRxFifo;
+Fifo<uint8_t, BT_TX_FIFO_SIZE> btTxFifo;
+Fifo<uint8_t, BT_RX_FIFO_SIZE> btRxFifo;
 
 #if defined(PCBX7) || defined(PCBXLITE)
 volatile uint8_t btChipPresent = 0;
diff --git a/radio/src/targets/horus/board.h b/radio/src/targets/horus/board.h
index 5514fe3c2..76d758640 100644
--- a/radio/src/targets/horus/board.h
+++ b/radio/src/targets/horus/board.h
@@ -609,6 +609,8 @@ void serial2Stop(void);
 #define USART_FLAG_ERRORS              (USART_FLAG_ORE | USART_FLAG_NE | USART_FLAG_FE | USART_FLAG_PE)
 
 // BT driver
+#define BT_TX_FIFO_SIZE    64
+#define BT_RX_FIFO_SIZE    128
 #define BLUETOOTH_BOOTLOADER_BAUDRATE   230400
 #define BLUETOOTH_FACTORY_BAUDRATE     57600
 #define BLUETOOTH_DEFAULT_BAUDRATE     115200
diff --git a/radio/src/targets/taranis/board.h b/radio/src/targets/taranis/board.h
index 8a8c8bb62..50ced0edf 100644
--- a/radio/src/targets/taranis/board.h
+++ b/radio/src/targets/taranis/board.h
@@ -726,6 +726,8 @@ void serial2Stop(void);
 #else
 #define BLUETOOTH_FACTORY_BAUDRATE      57600
 #endif
+#define BT_TX_FIFO_SIZE    64
+#define BT_RX_FIFO_SIZE    128
 void bluetoothInit(uint32_t baudrate, bool enable);
 void bluetoothWriteWakeup(void);
 uint8_t bluetoothIsWriting(void);