SG_USING_STD(string);
SG_USING_STD(vector);
-#include <Main/fgfs.hxx> // for FGSubsystem
+#include <simgear/structure/subsystem_mgr.hxx> // for SGSubsystem
// Don't pull in the headers, since we don't need them here.
class SGModelPlacement;
-class FGAircraftModel : public FGSubsystem
+class FGAircraftModel : public SGSubsystem
{
public: