diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-ADSB/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-ADSB/hwdef-bl.dat
new file mode 100644
index 0000000000..b9005f8494
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-ADSB/hwdef-bl.dat
@@ -0,0 +1,2 @@
+include ../MatekL431/hwdef-bl.inc
+
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-ADSB/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-ADSB/hwdef.dat
new file mode 100644
index 0000000000..ad595a85b8
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-ADSB/hwdef.dat
@@ -0,0 +1,11 @@
+include ../MatekL431/hwdef.inc
+
+define HAL_USE_ADC FALSE
+define STM32_ADC_USE_ADC1 FALSE
+define HAL_DISABLE_ADC_DRIVER TRUE
+
+# ENABLE ADSB
+define HAL_PERIPH_ENABLE_ADSB
+define HAL_PERIPH_ADSB_PORT_DEFAULT 2
+
+