diff --git a/backport-build-allow-win95-threads-enable-small.patch b/backport-build-allow-win95-threads-enable-small.patch
new file mode 100644
index 0000000000000000000000000000000000000000..cdf12aee17a052ae9f1a6f21c5d301214b474d1a
--- /dev/null
+++ b/backport-build-allow-win95-threads-enable-small.patch
@@ -0,0 +1,60 @@
+From de574404c4c2f87aca049f232c38526e3ce092aa Mon Sep 17 00:00:00 2001
+From: Jia Tan <jiat0218@gmail.com>
+Date: Wed, 9 Aug 2023 20:35:16 +0800
+Subject: [PATCH] Build: Conditionally allow win95 threads and --enable-small.
+
+When the compiler supports __attribute__((__constructor__))
+mythread_once() is never used, even with --enable-small. A configuration
+with win95 threads and --enable-small will compile and be thread safe so
+it can be allowed.
+
+This isn't a very common configuration since MSVC does not support
+__attribute__((__constructor__)), but MINGW32 and CLANG32 environments
+for MSYS2 can use win95 threads and have
+__attribute__((__constructor__)) support.
+
+---
+ configure.ac | 20 ++++++++++++--------
+ 1 file changed, 12 insertions(+), 8 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 7202188..b9cf44d 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -437,14 +437,6 @@ case $enable_threads in
+ 		;;
+ esac
+ 
+-# The Win95 threading lacks thread-safe one-time initialization function.
+-# It's better to disallow it instead of allowing threaded but thread-unsafe
+-# build.
+-if test "x$enable_small$enable_threads" = xyeswin95; then
+-	AC_MSG_ERROR([--enable-threads=win95 and --enable-small cannot be
+-		used at the same time])
+-fi
+-
+ # We use the actual result a little later.
+ 
+ 
+@@ -861,6 +853,18 @@ AC_COMPILE_IFELSE([
+ ])
+ CFLAGS="$OLD_CFLAGS"
+ 
++# The Win95 threading lacks a thread-safe one-time initialization function.
++# The one-time initialization is needed for crc32_small.c and crc64_small.c
++# create the CRC tables. So if small mode is enabled, the threading mode is
++# win95, and the compiler does not support attribute constructor, then we
++# would end up with a multithreaded build that is thread-unsafe. As a
++# result this configuration is not allowed.
++if test "x$enable_small$enable_threads$have_func_attribute_constructor"\
++		= xyeswin95no; then
++	AC_MSG_ERROR([--enable-threads=win95 and --enable-small cannot be
++		used at the same time with a compiler that doesn't support
++		__attribute__((__constructor__))])
++fi
+ 
+ ###############################################################################
+ # Checks for library functions.
+-- 
+2.27.0
+
diff --git a/xz.spec b/xz.spec
index 388216384527c36af56b87caafdea2398f478bcf..7d801001dfc26f52b22e30de368006bf9d500367 100644
--- a/xz.spec
+++ b/xz.spec
@@ -1,6 +1,6 @@
 Name:           xz
 Version:        5.4.4
-Release:        2
+Release:        3
 Summary:        A free general-purpose data compreession software with LZMA2 algorithm
 License:        GPL-3.0-only
 URL:            http://tukaani.org/xz
@@ -8,6 +8,7 @@ Source0:        http://tukaani.org/%{name}/%{name}-%{version}.tar.xz
 Source1:        colorxzgrep.sh
 Source2:        colorxzgrep.csh
 Patch0:         backport-liblzma-Add-overflow-check-for-Unpadded-size-in-lzma.patch
+Patch1:         backport-build-allow-win95-threads-enable-small.patch
 
 BuildRequires:  perl-interpreter gcc
 
@@ -115,6 +116,9 @@ LD_LIBRARY_PATH=$PWD/src/liblzma/.libs make check
 %{_mandir}/pt_BR/man1/*
 
 %changelog
+* Wed May 08 2024 zhangyaqi <zhangyaqi@kylinos.cn> - 5.4.4-3
+- Build: Conditionally allow win95 threads and --enable-small.
+
 * Tue Apr 30 2024 kouwenqi <kouwenqi@kylinos.cn> - 5.4.4-2
 - liblzma: Add overflow check for Unpadded size in lzma_index_append