diff --git a/libraries/AP_HAL_ChibiOS/hwdef/fmuv4/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/fmuv4/hwdef.dat
index 3f47ec72ed..d2572940e3 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/fmuv4/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/fmuv4/hwdef.dat
@@ -104,7 +104,9 @@ PC2 MPU9250_CS CS
 PC3 LED_SAFETY OUTPUT
 PC4 SAFETY_IN INPUT PULLDOWN
 PC5 VDD_PERIPH_EN OUTPUT HIGH
+
 PC7 TIM8_CH2 TIM8 RCININT FLOAT LOW # also USART6_RX for serial RC
+PC13 SBUS_INV OUTPUT LOW
 
 PC8 SDIO_D0 SDIO
 PC9 SDIO_D1 SDIO
@@ -112,7 +114,7 @@ PC10 SDIO_D2 SDIO
 PC11 SDIO_D3 SDIO
 PC12 SDIO_CK SDIO
 
-PC13 SBUS_INV OUTPUT
+
 PC14 20608_DRDY INPUT
 PC15 20608_CS CS