diff --git a/ChangeLog b/ChangeLog
index 3f73f2f..6b27a87 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-08-08  Ian Douglas Scott  <ian@iandouglasscott.com>
+	    Ben Elliston  <bje@gnu.org>
+
+	* config.guess (*:Redox:*:*): New.
+	* testsuite/config-guess.data: Add a test case.
+
 2017-07-19  Ben Elliston  <bje@gnu.org>
 
 	* config.guess: Improve "outdated script" message.
diff --git a/config.guess b/config.guess
index 07785f5..a744844 100755
--- a/config.guess
+++ b/config.guess
@@ -2,7 +2,7 @@
 # Attempt to guess a canonical system name.
 #   Copyright 1992-2017 Free Software Foundation, Inc.
 
-timestamp='2017-07-19'
+timestamp='2017-08-08'
 
 # 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
@@ -259,6 +259,9 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
     *:Sortix:*:*)
 	echo ${UNAME_MACHINE}-unknown-sortix
 	exit ;;
+    *:Redox:*:*)
+	echo ${UNAME_MACHINE}-unknown-redox
+	exit ;;
     alpha:OSF1:*:*)
 	case $UNAME_RELEASE in
 	*4.0)
diff --git a/testsuite/config-guess.data b/testsuite/config-guess.data
index a2542db..44a8391 100644
--- a/testsuite/config-guess.data
+++ b/testsuite/config-guess.data
@@ -88,6 +88,7 @@ x86		 6.0			 Interix		 ignored	 ignored	 i586-pc-interix6.0
 x86_64		 1.0			 Haiku			 ignored	 ignored	 x86_64-unknown-haiku
 x86_64		 1.0			 MINGW64		 ignored	 ignored	 x86_64-pc-mingw64
 x86_64		 1.0			 MINGW			 ignored	 ignored	 x86_64-pc-mingw32
+x86_64		 1.0			 Redox			 ignored	 ignored	 x86_64-unknown-redox
 x86_64		 1.0			 Sortix			 ignored	 ignored	 x86_64-unknown-sortix
 x86_64		 1.5.18(0.132/4/2)	 CYGWIN_NT-5.2		 ignored	 ignored	 x86_64-unknown-cygwin
 x86_64		 2.0.0(0.271/5/3)	 MSYS_NT-6.1		 ignored	 ignored	 x86_64-pc-msys