diff --git a/include/config.h.in b/include/config.h.in
index e1b4f1ada..731add21a 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -71,6 +71,9 @@
 /* Define if you have the <linux/ppdev.h> header file.  */
 #undef HAVE_LINUX_PPDEV_H
 
+/* Define if you have the <sgtty.h> header file.  */
+#undef HAVE_SGTTY_H
+
 /* Define if you have the <sys/ioccom.h> header file.  */
 #undef HAVE_SYS_IOCCOM_H
 
@@ -80,6 +83,15 @@
 /* Define if you have the <sys/time.h> header file.  */
 #undef HAVE_SYS_TIME_H
 
+/* Define if you have the <term.h> header file.  */
+#undef HAVE_TERM_H
+
+/* Define if you have the <termio.h> header file.  */
+#undef HAVE_TERMIO_H
+
+/* Define if you have the <termios.h> header file.  */
+#undef HAVE_TERMIOS_H
+
 /* Define if you have the <unistd.h> header file.  */
 #undef HAVE_UNISTD_H