/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
#include "intprops.h"
#include "inttostr.h"