diff --git a/config.guess b/config.guess
index b7806a8..7f76b62 100755
--- a/config.guess
+++ b/config.guess
@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2022-01-03'
+timestamp='2022-01-09'
 
 # 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
@@ -929,6 +929,9 @@ EOF
     i*:PW*:*)
 	GUESS=$UNAME_MACHINE-pc-pw32
 	;;
+    *:SerenityOS:*:*)
+        GUESS=$UNAME_MACHINE-pc-serenity
+        ;;
     *:Interix*:*)
 	case $UNAME_MACHINE in
 	    x86)
diff --git a/doc/config.guess.1 b/doc/config.guess.1
index f9a925e..d317190 100644
--- a/doc/config.guess.1
+++ b/doc/config.guess.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.48.5.
-.TH CONFIG.GUESS "1" "January 2022" "GNU config.guess (2022-01-03)" "User Commands"
+.TH CONFIG.GUESS "1" "January 2022" "GNU config.guess (2022-01-09)" "User Commands"
 .SH NAME
 config.guess \- guess the build system triplet
 .SH SYNOPSIS
diff --git a/testsuite/config-guess.data b/testsuite/config-guess.data
index e4f4952..cd12ff3 100644
--- a/testsuite/config-guess.data
+++ b/testsuite/config-guess.data
@@ -82,6 +82,7 @@ i686 | 1.0 | MidnightBSD | ignored | ignored | i686-unknown-midnightbsd1.0
 i686 | 1.0.17(0.48/3/2) | MSYS_NT-6.0 | ignored | ignored | i686-pc-msys
 i686 | 5.11-686 | GNU/kOpenSolaris | ignored | ignored | i686-unknown-kopensolaris5.11-gnu
 i686 | 5.4-1-686 | GNU/kFreeBSD | ignored | ignored | i686-unknown-kfreebsd5.4-gnu
+i686 | 1.0-dev | SerenityOS | ignored | ignored | i686-pc-serenity
 i86pc | 5.0 | AuroraUX | ignored | ignored | i386-pc-auroraux5.0
 i86pc | 5.6 | SunOS | ignored | ignored | i386-pc-solaris2.6
 i86xen | 5.0 | AuroraUX | ignored | ignored | i386-pc-auroraux5.0
@@ -134,4 +135,5 @@ x86_64 | 2.0.0(0.271/5/3) | MSYS_NT-6.1 | ignored | ignored | x86_64-pc-msys
 x86_64 | 2.6.32 | Linux | ignored | ignored | x86_64-pc-linux-gnu
 x86_64 | 2.6.32 | VMkernel | ignored | ignored | x86_64-unknown-esx
 x86_64 | 8.0 | OS108 | ignored | ignored | x86_64-unknown-os108_8.0
+x86_64 | 1.0-dev | SerenityOS | ignored | ignored | x86_64-pc-serenity
 xtensa | 2.6.15 | Linux | ignored | ignored | xtensa-unknown-linux-gnu