diff --git a/libraries/AP_Terrain/AP_Terrain.cpp b/libraries/AP_Terrain/AP_Terrain.cpp
index 1bfdf644d5..551263a499 100644
--- a/libraries/AP_Terrain/AP_Terrain.cpp
+++ b/libraries/AP_Terrain/AP_Terrain.cpp
@@ -20,6 +20,9 @@
 #include <GCS_MAVLink.h>
 #include <GCS.h>
 #include "AP_Terrain.h"
+
+#if HAVE_AP_TERRAIN
+
 #include <assert.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -28,8 +31,6 @@
 #include <fcntl.h>
 #include <errno.h>
 
-#if HAVE_AP_TERRAIN
-
 #define TERRAIN_DEBUG 0
 
 extern const AP_HAL::HAL& hal;