diff --git a/libraries/AP_GPS/AP_GPS.h b/libraries/AP_GPS/AP_GPS.h
index 56c28c9595..7ab6a46137 100644
--- a/libraries/AP_GPS/AP_GPS.h
+++ b/libraries/AP_GPS/AP_GPS.h
@@ -26,7 +26,7 @@
 #include <GCS_MAVLink/GCS_MAVLink.h>
 #include <AP_Vehicle/AP_Vehicle.h>
 #include "GPS_detect_state.h"
-#include "../AP_SerialManager/AP_SerialManager.h"
+#include <AP_SerialManager/AP_SerialManager.h>
 
 /**
    maximum number of GPS instances available on this platform. If more