diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-RC/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-RC/hwdef-bl.dat
new file mode 100644
index 0000000000..d394ea6a77
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekL431-RC/hwdef-bl.dat
@@ -0,0 +1 @@
+include ../MatekL431/hwdef-bl.inc