--- a/config.h.in
+++ b/config.h.in
@@ -140,6 +140,9 @@
 
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/termios.h> header file. */
+#undef HAVE_SYS_TERMIOS_H
 
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H