diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubePilot-PPPGW/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubePilot-PPPGW/hwdef-bl.dat
index 83e9d53d2fcf35..183c98b57b6a7b 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubePilot-PPPGW/hwdef-bl.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubePilot-PPPGW/hwdef-bl.dat
@@ -15,6 +15,3 @@ define BOARD_PHY_ID  MII_LAN8720_ID
 define BOARD_PHY_RMII
 
 include ../include/network_bootloader.inc
-
-# allow USB bootloader too
-SERIAL_ORDER OTG1