diff --git a/libraries/AC_AttitudeControl/examples/AC_AttitudeControl_test/AC_AttitudeControl_test.pde b/libraries/AC_AttitudeControl/examples/AC_AttitudeControl_test/AC_AttitudeControl_test.pde
index 16893b967c..5e0484a887 100644
--- a/libraries/AC_AttitudeControl/examples/AC_AttitudeControl_test/AC_AttitudeControl_test.pde
+++ b/libraries/AC_AttitudeControl/examples/AC_AttitudeControl_test/AC_AttitudeControl_test.pde
@@ -27,6 +27,7 @@
 #include <AP_Buffer.h>          // ArduPilot general purpose FIFO buffer
 #include <AP_InertialNav.h>     // Inertial Navigation library
 #include <GCS_MAVLink.h>
+#include <AP_Mission.h>
 #include <AP_Notify.h>
 #include <AP_Vehicle.h>
 #include <DataFlash.h>