diff --git a/libraries/APM_Control/AR_AttitudeControl.cpp b/libraries/APM_Control/AR_AttitudeControl.cpp
index ab6d76b350..26507ac139 100644
--- a/libraries/APM_Control/AR_AttitudeControl.cpp
+++ b/libraries/APM_Control/AR_AttitudeControl.cpp
@@ -16,6 +16,7 @@
 #include <AP_Math/AP_Math.h>
 #include <AP_HAL/AP_HAL.h>
 #include "AR_AttitudeControl.h"
+#include <AP_GPS/AP_GPS.h>
 
 extern const AP_HAL::HAL& hal;