diff --git a/src/main/target/ALIENFLIGHTF3/initialisation.c b/src/main/target/ALIENFLIGHTF3/initialisation.c
new file mode 100644
index 0000000000..a2ed98f97f
--- /dev/null
+++ b/src/main/target/ALIENFLIGHTF3/initialisation.c
@@ -0,0 +1,41 @@
+/*
+ * This file is part of Cleanflight.
+ *
+ * Cleanflight is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Cleanflight is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "platform.h"
+#include "drivers/bus.h"
+#include "drivers/bus_i2c.h"
+#include "drivers/bus_spi.h"
+#include "io/serial.h"
+#include "hardware_revision.h"
+#include "pg/bus_i2c.h"
+#include "pg/bus_spi.h"
+
+extern void spiPreInit(void);
+
+void targetBusInit(void)
+{
+    if (hardwareRevision == AFF3_REV_2) {
+        spiPinConfigure(spiPinConfig());
+        spiPreInit();
+        spiInit(SPIDEV_3);
+    }
+    i2cHardwareConfigure(i2cConfig());
+    i2cInit(I2CDEV_2);
+}
diff --git a/src/main/target/ALIENFLIGHTF3/target.h b/src/main/target/ALIENFLIGHTF3/target.h
index f4536c99d3..f61a54bdd3 100644
--- a/src/main/target/ALIENFLIGHTF3/target.h
+++ b/src/main/target/ALIENFLIGHTF3/target.h
@@ -19,6 +19,7 @@
 
 #define TARGET_BOARD_IDENTIFIER "AFF3" // AlienFlight F3.
 #define USE_TARGET_CONFIG
+#define TARGET_BUS_INIT
 #define REMAP_TIM17_DMA
 
 #define CONFIG_FASTLOOP_PREFERRED_ACC ACC_DEFAULT