diff --git a/libraries/AP_HAL_ChibiOS/hwdef/luminousbee4/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/luminousbee4/hwdef.dat
index eeb134b5bc..26517610ab 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/luminousbee4/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/luminousbee4/hwdef.dat
@@ -169,7 +169,7 @@ define HAL_BATT_VOLT_SCALE 10.1
 define HAL_BATT_CURR_SCALE 17.0
 
 # setup serial port defaults for ESP8266
-define HAL_SERIAL5_PROTOCOL SerialProtocol_MAVLink
+define HAL_SERIAL5_PROTOCOL SerialProtocol_MAVLink2
 define HAL_SERIAL5_BAUD 921600
 
 # 6 PWM available by default