diff --git a/config.sub b/config.sub
index 7937ce4..51394d3 100755
--- a/config.sub
+++ b/config.sub
@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-08-23'
+timestamp='2023-09-15'
 
 # 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
@@ -1181,7 +1181,7 @@ case $cpu-$vendor in
 		case $cpu in
 			1750a | 580 \
 			| a29k \
-			| aarch64 | aarch64_be | aarch64c \
+			| aarch64 | aarch64_be | aarch64c | arm64ec \
 			| abacus \
 			| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] \
 			| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] \
diff --git a/doc/config.sub.1 b/doc/config.sub.1
index 000d13c..d5ca2a8 100644
--- a/doc/config.sub.1
+++ b/doc/config.sub.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.48.5.
-.TH CONFIG.SUB "1" "August 2023" "GNU config.sub (2023-08-23)" "User Commands"
+.TH CONFIG.SUB "1" "September 2023" "GNU config.sub (2023-09-15)" "User Commands"
 .SH NAME
 config.sub \- validate and canonicalize a configuration triplet
 .SH SYNOPSIS
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index a23f4be..7fb234c 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -106,6 +106,8 @@ arm64-apple-tvos				aarch64-apple-tvos
 arm64-apple-tvos10.0.0				aarch64-apple-tvos10.0.0
 arm64-apple-watchos				aarch64-apple-watchos
 arm64-apple-watchos5.0				aarch64-apple-watchos5.0
+arm64ec-pc-mingw32				arm64ec-pc-mingw32
+arm64ec-windows 				arm64ec-unknown-windows
 armbe						armbe-unknown-none
 armeb-unknown-netbsdelf7.0			armeb-unknown-netbsdelf7.0
 armel						armel-unknown-none