diff --git a/libraries/AP_GPS/AP_GPS_None.h b/libraries/AP_GPS/AP_GPS_None.h
index ecba958b8a..f7c5d9daad 100644
--- a/libraries/AP_GPS/AP_GPS_None.h
+++ b/libraries/AP_GPS/AP_GPS_None.h
@@ -7,6 +7,8 @@
 
 class AP_GPS_None : public GPS
 {
+public:
+	AP_GPS_None(Stream *s) : GPS(s) {}
 	virtual void init(void) {};
 	virtual bool read(void) { return false; };
 };