diff --git a/libraries/AC_AttitudeControl/AC_AttitudeControl.h b/libraries/AC_AttitudeControl/AC_AttitudeControl.h
index 6904aa9d47..afc2d99d03 100644
--- a/libraries/AC_AttitudeControl/AC_AttitudeControl.h
+++ b/libraries/AC_AttitudeControl/AC_AttitudeControl.h
@@ -6,6 +6,7 @@
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
 #include <AP_Math/AP_Math.h>
+#include <AP_Vehicle/AP_Vehicle.h>
 #include <AP_AHRS/AP_AHRS_View.h>
 #include <AP_Motors/AP_Motors.h>
 #include <AC_PID/AC_PID.h>