--- a/build-aux/config.sub	Tue Feb 20 09:06:51 2018 -0800
+++ b/build-aux/config.sub	Thu Feb 22 07:43:48 2018 -0800
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2018 Free Software Foundation, Inc.
 
-timestamp='2018-01-15'
+timestamp='2018-02-22'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -1389,7 +1389,8 @@
 	      | -morphos* | -superux* | -rtmk* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
 	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
-	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme*)
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme* \
+	      | -midnightbsd*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)