diff --git a/libraries/AP_Terrain/AP_Terrain.h b/libraries/AP_Terrain/AP_Terrain.h
index c2919e4bea..0d907c5839 100644
--- a/libraries/AP_Terrain/AP_Terrain.h
+++ b/libraries/AP_Terrain/AP_Terrain.h
@@ -18,7 +18,7 @@
 #include <AP_Filesystem/AP_Filesystem_config.h>
 
 #ifndef AP_TERRAIN_AVAILABLE
-#if HAVE_FILESYSTEM_SUPPORT && defined(HAL_BOARD_TERRAIN_DIRECTORY)
+#if AP_FILESYSTEM_FILE_READING_ENABLED && defined(HAL_BOARD_TERRAIN_DIRECTORY)
 #define AP_TERRAIN_AVAILABLE 1
 #else
 #define AP_TERRAIN_AVAILABLE 0