# error This library requires C++
#endif
-#include <simgear/misc/props.hxx>
-#include <Main/fgfs.hxx>
+#include <simgear/props/props.hxx>
+#include <simgear/structure/subsystem_mgr.hxx>
/**
*
* /instrumentation/airspeed-indicator/indicated-speed-kt
*/
-class AirspeedIndicator : public FGSubsystem
+class AirspeedIndicator : public SGSubsystem
{
public: