# include <alloca.h>
# endif /* !IBMESA */
# else /* !HAVE_ALLOCA_H */
-# if defined (hpux_9) && defined (__STDC__) && !defined (alloca)
+# if defined (__hpux) && defined (__STDC__) && !defined (alloca)
extern void *alloca ();
# else
# if !defined (alloca)
extern char *alloca ();
# endif /* !alloca */
-# endif /* !hpux_9 || !__STDC__ && !alloca */
+# endif /* !__hpux || !__STDC__ && !alloca */
# endif /* !HAVE_ALLOCA_H */
#endif /* !__GNUC__ */