diff --git a/libraries/AP_HAL/AP_HAL_Boards.h b/libraries/AP_HAL/AP_HAL_Boards.h
index 457ebfa4eb..4f245363bf 100644
--- a/libraries/AP_HAL/AP_HAL_Boards.h
+++ b/libraries/AP_HAL/AP_HAL_Boards.h
@@ -84,6 +84,7 @@
 #define HAL_COMPASS_VRBRAIN   4
 #define HAL_COMPASS_AK8963_MPU9250 5
 #define HAL_COMPASS_AK8963_I2C  6
+#define HAL_COMPASS_HMC5843_MPU6000 7
 
 /**
    CPU classes, used to select if CPU intensive algorithms should be used