# include <values.h> // for MAXINT
#endif
+#include <simgear/constants.h>
+#include <simgear/debug/logstream.hxx>
+#include <simgear/math/fg_random.h>
+#include <simgear/math/polar3d.hxx>
+
#include <Aircraft/aircraft.hxx>
-#include <Debug/logstream.hxx>
#include <GUI/gui.h>
-#include <Include/fg_constants.h>
#include <Main/options.hxx>
-#include <Math/fg_random.h>
-#include <Math/mat3.h>
-#include <Math/polar3d.hxx>
+#ifdef FG_NETWORK_OLK
#include <NetworkOLK/network.h>
+#endif
#include <Scenery/scenery.hxx>
#include <Time/fg_timer.hxx>