diff --git a/Tools/AP_Bootloader/can.cpp b/Tools/AP_Bootloader/can.cpp
index 9f1427dbb5..76e3974759 100644
--- a/Tools/AP_Bootloader/can.cpp
+++ b/Tools/AP_Bootloader/can.cpp
@@ -16,7 +16,7 @@
   CAN bootloader support
  */
 #include <AP_HAL/AP_HAL.h>
-
+#include <hal.h>
 #if HAL_USE_CAN == TRUE || HAL_NUM_CAN_IFACES
 #include <AP_Math/AP_Math.h>
 #include <AP_Math/crc.h>