diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeBlack-periph/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeBlack-periph/hwdef.dat
index 5a7f6738d6..ed9c9cf59b 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeBlack-periph/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeBlack-periph/hwdef.dat
@@ -54,8 +54,6 @@ define HAL_BARO_ALLOW_INIT_NO_BARO
 
 define HAL_PERIPH_ENABLE_BATTERY
 
-define HAL_SUPPORT_RCOUT_SERIAL 0
-
 define HAL_CAN_DEFAULT_NODE_ID 0
 
 define CAN_APP_NODE_NAME "org.ardupilot.CubeBlack-periph"
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange-periph/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange-periph/hwdef.dat
index 15df32d9c5..c6b6346a3a 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange-periph/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeOrange-periph/hwdef.dat
@@ -47,8 +47,6 @@ define HAL_BARO_ALLOW_INIT_NO_BARO
 
 define HAL_PERIPH_ENABLE_BATTERY
 
-define HAL_SUPPORT_RCOUT_SERIAL 0
-
 define HAL_CAN_DEFAULT_NODE_ID 0
 
 define CAN_APP_NODE_NAME "org.ardupilot.CubeOrange-periph"