diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat
index 1c293cc291..333acb54ab 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange/hwdef.dat
@@ -145,8 +145,8 @@ PD5 USART2_TX USART2
 PD6 USART2_RX USART2
 
 # telem1 RTS and CTS as GPIO in alt config 1
-PD3 EXTERN_GPIO4 GPIO(4) ALT(1)
-PD4 EXTERN_GPIO5 GPIO(5) ALT(1)
+PD3 EXTERN_GPIO4 OUTPUT GPIO(4) ALT(1)
+PD4 EXTERN_GPIO5 OUTPUT GPIO(5) ALT(1)
 
 # The telem2 USART, also with RTS/CTS available.
 # USART3 serial3 telem2