//
// Written by Curtis Olson, started February 2000.
//
-// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
#include <simgear/compiler.h>
+#ifdef _MSC_VER
+# define _USE_MATH_DEFINES
+#endif
#ifdef SG_HAVE_STD_INCLUDES
# include <cmath>
#else