#if defined( SG_HAVE_STD_INCLUDES )
# include <istream>
-#elif defined ( FG_HAVE_NATIVE_SGI_COMPILERS )
+#elif defined ( SG_HAVE_NATIVE_SGI_COMPILERS )
# include <CC/stream.h>
#elif defined ( __BORLANDC__ )
# include <iostream>
#include <simgear/misc/zfstream.hxx>
-FG_USING_STD(string);
+SG_USING_STD(string);
-#ifndef FG_HAVE_NATIVE_SGI_COMPILERS
-FG_USING_STD(istream);
+#ifndef SG_HAVE_NATIVE_SGI_COMPILERS
+SG_USING_STD(istream);
#endif