#include <iosfwd>
+#include "SGMathFwd.hxx"
+
+#include "SGCMath.hxx"
#include "SGLimits.hxx"
#include "SGMisc.hxx"
#include "SGGeodesy.hxx"
+#include "SGVec2.hxx"
#include "SGVec3.hxx"
#include "SGVec4.hxx"
-#include "SGQuat.hxx"
-#include "SGMatrix.hxx"
#include "SGGeoc.hxx"
#include "SGGeod.hxx"
+#include "SGQuat.hxx"
+#include "SGLocation.hxx"
+#include "SGMatrix.hxx"
#endif