diff --git a/libraries/AP_HAL_Linux/Util.cpp b/libraries/AP_HAL_Linux/Util.cpp
index 66d0291350..cea7cadc0f 100644
--- a/libraries/AP_HAL_Linux/Util.cpp
+++ b/libraries/AP_HAL_Linux/Util.cpp
@@ -11,6 +11,7 @@
 extern const AP_HAL::HAL& hal;
 
 #include "Util.h"
+#include "HAL_Linux_Class.h"
 using namespace Linux;
 
 
diff --git a/libraries/AP_HAL_Linux/Util.h b/libraries/AP_HAL_Linux/Util.h
index 608e161ee4..8e74db3295 100644
--- a/libraries/AP_HAL_Linux/Util.h
+++ b/libraries/AP_HAL_Linux/Util.h
@@ -29,12 +29,14 @@ public:
     /*
       set system clock in UTC microseconds
      */
-    void set_system_clock(uint64_t time_utc_usec);
+    void set_system_clock(uint64_t time_utc_usec);    
+    const char* get_custom_log_directory();
+    const char* get_custom_terrain_directory();
 
     bool is_chardev_node(const char *path);
 
 private:
-	  static Linux::ToneAlarm _toneAlarm;
+    static Linux::ToneAlarm _toneAlarm;
     int saved_argc;
     char* const *saved_argv;
 };