diff --git a/libraries/AP_NavEKF/AP_NavEKF_core_common.h b/libraries/AP_NavEKF/AP_NavEKF_core_common.h index 0adbded311..4c0d6c19ef 100644 --- a/libraries/AP_NavEKF/AP_NavEKF_core_common.h +++ b/libraries/AP_NavEKF/AP_NavEKF_core_common.h @@ -18,6 +18,7 @@ #include <stdint.h> #include <AP_Math/AP_Math.h> +#include <AP_Math/vectorN.h> /* this declares a common parent class for AP_NavEKF2 and