diff --git a/libraries/AP_HAL_ChibiOS/hwdef/DrotekP3Pro/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/DrotekP3Pro/hwdef.dat
index 39c6f003ad..bacc62e8d1 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/DrotekP3Pro/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/DrotekP3Pro/hwdef.dat
@@ -239,7 +239,7 @@ 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
 
 # 8 PWM available by default