--- configure.ac.orig	2018-06-28 08:18:19 UTC
+++ configure.ac
@@ -595,11 +595,10 @@ AC_CHECK_DECL([openpty],
                  [AC_DEFINE([HAVE_OPENPTY_DECL], [1],
                               [openpty is declared])], [],
                  [
-#if defined(HAVE_UTIL_H)
-# include <util.h>
-#elif defined(HAVE_PTY_H)
-# include <pty.h>
-#endif
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <termios.h>
+#include <libutil.h>
                  ]) # HAVE_OPENPTY_DECL
 
 AC_CHECK_LIB([c], [openpty],