diff --git a/libraries/AP_HAL/board/chibios.h b/libraries/AP_HAL/board/chibios.h
index 23bbc79279..5aff46984f 100644
--- a/libraries/AP_HAL/board/chibios.h
+++ b/libraries/AP_HAL/board/chibios.h
@@ -59,6 +59,7 @@
 #define HAL_COMPASS_LIS3MDL_NAME "lis3mdl"
 
 #define HAL_BOARD_LOG_DIRECTORY "/APM/LOGS"
+#define HAL_BOARD_TERRAIN_DIRECTORY "/APM/TERRAIN"
 
 #define STORAGE_FLASH_PAGE		22
 #define HAL_STORAGE_SIZE        16384