#ifndef __FGFX_HXX
#define __FGFX_HXX 1
-#include <Main/fgfs.hxx>
+#include <simgear/structure/subsystem_mgr.hxx>
class SGSound;
* on current flight conditions. The sound manager must be initialized
* before this object is.
*/
-class FGFX : public FGSubsystem
+class FGFX : public SGSubsystem
{
public: