diff --git a/libraries/AP_HAL_ChibiOS/hwdef/fmuv4-beta/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/fmuv4-beta/hwdef.dat
new file mode 100644
index 0000000000..8021e52e05
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/fmuv4-beta/hwdef.dat
@@ -0,0 +1,14 @@
+# hardware config for early beta pixracer boards (prior to R12)
+
+include ../fmuv4/hwdef.dat
+
+# SPI2 SCK is on PB13
+#define GPIO_SPI2_SCK	(GPIO_SPI2_SCK_2|GPIO_SPEED_50MHz)
+undef SPI2_SCK
+PB13 SPI2_SCK SPI2
+
+# note that PC13 (SBUS invert) is active low on this board
+
+# baro is on main sensors bus
+define HAL_BARO_MS5611_SPI_INT_NAME "ms5611_int2"
+SPIDEV ms5611_int2  SPI1 DEVID3  BARO_CS    MODE3  20*MHZ  20*MHZ