diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-RC/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-RC/hwdef.dat
new file mode 100644
index 0000000000..418c3394b0
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-RC/hwdef.dat
@@ -0,0 +1,10 @@
+include ../MatekL431/hwdef.inc
+
+define CAN_APP_NODE_NAME "org.ardupilot.MatekL431-RC"
+
+define HAL_USE_ADC FALSE
+define STM32_ADC_USE_ADC1 FALSE
+define HAL_DISABLE_ADC_DRIVER TRUE
+
+define HAL_PERIPH_ENABLE_RCIN 1
+define AP_PERIPH_RC1_PORT_DEFAULT 2