diff --git a/backport-fix-out-of-tree-build.patch b/backport-fix-out-of-tree-build.patch
new file mode 100644
index 0000000..c523984
--- /dev/null
+++ b/backport-fix-out-of-tree-build.patch
@@ -0,0 +1,65 @@
+From 3ab54ca1b93c7e8c304850683c0da1bcce0f5fa1 Mon Sep 17 00:00:00 2001
+From: changhan <changhan@xfusion.com>
+Date: Thu, 17 Apr 2025 19:39:31 +0800
+Subject: [PATCH] Fix-out-of-tree-build
+
+---
+ src/Makefile.am | 20 ++++++++++----------
+ 1 file changed, 10 insertions(+), 10 deletions(-)
+
+diff --git a/src/Makefile.am b/src/Makefile.am
+index d32f52f..ac01ca4 100644
+--- a/src/Makefile.am
++++ b/src/Makefile.am
+@@ -83,39 +83,39 @@ libmd.sym: libmd.map
+ 	$(AM_V_GEN) $(SED) -ne 's/^[[:space:]]\{1,\}\([A-Za-z0-9_]\{1,\}\);/\1/p' libmd.map > $@
+ 
+ md2hl.c: helper.c
+-	$(AM_V_GEN) $(SED) -e 's/hashinc/md2.h/g' -e 's/HASH/MD2/g' helper.c > $@
++	$(AM_V_GEN) $(SED) -e 's/hashinc/md2.h/g' -e 's/HASH/MD2/g' "$(srcdir)/helper.c" > $@
+ 
+ md4hl.c: helper.c
+-	$(AM_V_GEN) $(SED) -e 's/hashinc/md4.h/g' -e 's/HASH/MD4/g' helper.c > $@
++	$(AM_V_GEN) $(SED) -e 's/hashinc/md4.h/g' -e 's/HASH/MD4/g' "$(srcdir)/helper.c" > $@
+ 
+ md5hl.c: helper.c
+-	$(AM_V_GEN) $(SED) -e 's/hashinc/md5.h/g' -e 's/HASH/MD5/g' helper.c > $@
++	$(AM_V_GEN) $(SED) -e 's/hashinc/md5.h/g' -e 's/HASH/MD5/g' "$(srcdir)/helper.c" > $@
+ 
+ rmd160hl.c: helper.c
+-	$(AM_V_GEN) $(SED) -e 's/hashinc/rmd160.h/g' -e 's/HASH/RMD160/g' helper.c > $@
++	$(AM_V_GEN) $(SED) -e 's/hashinc/rmd160.h/g' -e 's/HASH/RMD160/g' "$(srcdir)/helper.c" > $@
+ 
+ sha1hl.c: helper.c
+-	$(AM_V_GEN) $(SED) -e 's/hashinc/sha1.h/g' -e 's/HASH/SHA1/g' helper.c > $@
++	$(AM_V_GEN) $(SED) -e 's/hashinc/sha1.h/g' -e 's/HASH/SHA1/g' "$(srcdir)/helper.c" > $@
+ 
+ sha224hl.c: helper.c
+ 	$(AM_V_GEN) $(SED) -e 's/hashinc/sha2.h/g' -e 's/HASH/SHA224/g' \
+-	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' helper.c > $@
++	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' "$(srcdir)/helper.c" > $@
+ 
+ sha256hl.c: helper.c
+ 	$(AM_V_GEN) $(SED) -e 's/hashinc/sha2.h/g' -e 's/HASH/SHA256/g' \
+-	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' helper.c > $@
++	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' "$(srcdir)/helper.c" > $@
+ 
+ sha384hl.c: helper.c
+ 	$(AM_V_GEN) $(SED) -e 's/hashinc/sha2.h/g' -e 's/HASH/SHA384/g' \
+-	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' helper.c > $@
++	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' "$(srcdir)/helper.c" > $@
+ 
+ sha512hl.c: helper.c
+ 	$(AM_V_GEN) $(SED) -e 's/hashinc/sha2.h/g' -e 's/HASH/SHA512/g' \
+-	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' helper.c > $@
++	                -e 's/SHA[0-9][0-9][0-9]_CTX/SHA2_CTX/g' "$(srcdir)/helper.c" > $@
+ 
+ sha512_256hl.c: helper.c
+ 	$(AM_V_GEN) $(SED) -e 's/hashinc/sha2.h/g' -e 's/HASH/SHA512_256/g' \
+-	                -e 's/SHA512_256_CTX/SHA2_CTX/g' helper.c > $@
++	                -e 's/SHA512_256_CTX/SHA2_CTX/g' "$(srcdir)/helper.c" > $@
+ 
+ runtimelibdir = $(libdir)
+ 
+-- 
+2.33.0
\ No newline at end of file
diff --git a/libmd.spec b/libmd.spec
index 6aa609a..ad4bc86 100644
--- a/libmd.spec
+++ b/libmd.spec
@@ -1,7 +1,7 @@
 Summary:        Library that provides message digest functions from BSD systems
 Name:           libmd
 Version:        1.1.0
-Release:        2
+Release:        3
 # Breakdown in COPYING file of libmd release tarball
 License:        BSD-2-Clause AND BSD-3-Clause AND ISC AND Beerware
 URL:            https://www.hadrons.org/software/libmd/
@@ -12,6 +12,8 @@ BuildRequires:  gnupg2
 BuildRequires:  gcc
 BuildRequires:  make
 
+Patch1:         backport-fix-out-of-tree-build.patch
+
 %description
 The libmd library provides a few message digest ("hash") functions, as
 found on various BSD systems, either on their libc or on a library with
@@ -34,6 +36,7 @@ gpg2 --homedir="${workdir}" --yes --output="${workring}" --dearmor '%{SOURCE2}'
 gpgv2 --homedir="${workdir}" --keyring="${workring}" '%{SOURCE1}' '%{SOURCE0}'
 rm --recursive --force ${workdir}
 %setup -q
+%autosetup -n %{name}-%{version} -p1
 
 %build
 %configure --disable-static
@@ -85,6 +88,9 @@ make check
 %{_mandir}/man3/sha2.3*
 
 %changelog
+* Thu Apr 17 2025 changhan <changhan@xfusion.com> - 1.1.0-3
+- Fix out-of-tree build
+
 * Thu Dec 12 2024 Dongxing Wang <dongxing.wang_a@thundersoft.com> - 1.1.0-2
 - Fix license desc remove public domain