diff --git a/libraries/AP_NavEKF3/AP_NavEKF3.cpp b/libraries/AP_NavEKF3/AP_NavEKF3.cpp
index 7e8dfadb0e5c5..57b837d9e47d0 100644
--- a/libraries/AP_NavEKF3/AP_NavEKF3.cpp
+++ b/libraries/AP_NavEKF3/AP_NavEKF3.cpp
@@ -1,8 +1,9 @@
+#include "AP_NavEKF3_core.h"
+
 #include "AP_NavEKF3.h"
 
 #include <AP_HAL/AP_HAL.h>
 
-#include "AP_NavEKF3_core.h"
 #include <GCS_MAVLink/GCS.h>
 #include <AP_Logger/AP_Logger.h>
 #include <AP_Vehicle/AP_Vehicle_Type.h>