diff --git a/libraries/AP_HAL_ChibiOS/hwdef/ARKV6X/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/ARKV6X/hwdef.dat
index 0c2038deb0..9a36471c7f 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/ARKV6X/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/ARKV6X/hwdef.dat
@@ -83,10 +83,9 @@ PH14 UART4_RX UART4
 PD8 USART3_TX USART3
 PD9 USART3_RX USART3
 
-# USART6 is for IOMCU
-PC6 USART6_TX USART6
 # used for RC SBUS
-#PC7 USART6_RX USART6
+PC6 USART6_TX USART6
+PC7 USART6_RX USART6
 
 # Uncomment this line for carriers boards with an IO MCU
 # IOMCU_UART USART6
@@ -284,7 +283,7 @@ PG0 HW_VER_REV_DRIVE OUTPUT LOW
 PF9 TIM14_CH1 TIM14 GPIO(77) ALARM
 
 # RC input
-PC7 TIM3_CH2 TIM3 RCININT PULLDOWN LOW
+PI5 TIM8_CH1 TIM8 RCININT PULLDOWN LOW
 
 # barometers
 BARO BMP388 I2C:0:0x76