diff --git a/0001-Fix-libxml2-v2.12.0-includes.patch b/0001-Fix-libxml2-v2.12.0-includes.patch
new file mode 100644
index 0000000..d32619c
--- /dev/null
+++ b/0001-Fix-libxml2-v2.12.0-includes.patch
@@ -0,0 +1,108 @@
+From ffb327376f5bb69e8dfe7f805529e45a40118c2b Mon Sep 17 00:00:00 2001
+From: lsh123 <aleksey@aleksey.com>
+Date: Mon, 20 Nov 2023 11:50:43 -0500
+Subject: [PATCH] Fix libxml2 v2.12.0 includes  (#729)
+
+---
+Dropped mscrypto changes as unused and conflicting with older sources
+
+ apps/crypto.c             |  1 +
+ apps/xmlsec.c             |  3 ++-
+ include/xmlsec/xmlsec.h   |  1 +
+ src/errors_helpers.h      | 10 +++++-----
+ 4 files changed, 9 insertions(+), 6 deletions(-)
+
+diff --git a/apps/crypto.c b/apps/crypto.c
+index 8561dd659..4411233da 100644
+--- a/apps/crypto.c
++++ b/apps/crypto.c
+@@ -12,6 +12,7 @@
+ #endif
+ 
+ #include <string.h>
++#include <stdlib.h>
+ 
+ #include <xmlsec/xmlsec.h>
+ #include <xmlsec/keys.h>
+diff --git a/apps/xmlsec.c b/apps/xmlsec.c
+index 7655c1dbd..4bedb16a7 100644
+--- a/apps/xmlsec.c
++++ b/apps/xmlsec.c
+@@ -22,6 +22,7 @@
+ #include <libxml/xmlmemory.h>
+ #include <libxml/parser.h>
+ #include <libxml/xpath.h>
++#include <libxml/xmlsave.h>
+ #include <libxml/xpathInternals.h>
+ 
+ #ifndef XMLSEC_NO_XSLT
+@@ -3030,7 +3031,7 @@ xmlSecAppInit(void) {
+     /* Init libxml */
+     xmlInitParser();
+     LIBXML_TEST_VERSION
+-    xmlTreeIndentString = "\t";
++    xmlThrDefTreeIndentString("\t");
+ #ifndef XMLSEC_NO_XSLT
+     xmlIndentTreeOutput = 1;
+ #endif /* XMLSEC_NO_XSLT */
+diff --git a/include/xmlsec/xmlsec.h b/include/xmlsec/xmlsec.h
+index 5757fc570..6f9101229 100644
+--- a/include/xmlsec/xmlsec.h
++++ b/include/xmlsec/xmlsec.h
+@@ -12,6 +12,7 @@
+ #define __XMLSEC_H__
+ 
+ #include <libxml/tree.h>
++#include <libxml/parser.h>
+ 
+ #include <xmlsec/version.h>
+ #include <xmlsec/exports.h>
+diff --git a/src/errors_helpers.h b/src/errors_helpers.h
+index 1a4f41837..470fdde65 100644
+--- a/src/errors_helpers.h
++++ b/src/errors_helpers.h
+@@ -136,7 +136,7 @@ extern "C" {
+  */
+ #define xmlSecXmlError(errorFunction, errorObject) \
+     {                                                 \
+-        xmlErrorPtr error = xmlGetLastError();        \
++        const xmlError * error = xmlGetLastError();        \
+         int code = (error != NULL) ? error->code : 0; \
+         const char* message = (error != NULL) ? error->message : NULL; \
+         xmlSecError(XMLSEC_ERRORS_HERE,               \
+@@ -159,7 +159,7 @@ extern "C" {
+  */
+ #define xmlSecXmlError2(errorFunction, errorObject, msg, param) \
+     {                                                 \
+-        xmlErrorPtr error = xmlGetLastError();        \
++        const xmlError * error = xmlGetLastError();        \
+         int code = (error != NULL) ? error->code : 0; \
+         const char* message = (error != NULL) ? error->message : NULL; \
+         xmlSecError(XMLSEC_ERRORS_HERE,               \
+@@ -181,7 +181,7 @@ extern "C" {
+  */
+ #define xmlSecXmlParserError(errorFunction, ctxt, errorObject) \
+     {                                                 \
+-        xmlErrorPtr error = xmlCtxtGetLastError(ctxt);\
++        const xmlError * error = xmlCtxtGetLastError(ctxt);\
+         int code = (error != NULL) ? error->code : 0; \
+         const char* message = (error != NULL) ? error->message : NULL; \
+         xmlSecError(XMLSEC_ERRORS_HERE,               \
+@@ -205,7 +205,7 @@ extern "C" {
+  */
+ #define xmlSecXmlParserError2(errorFunction, ctxt, errorObject, msg, param) \
+     {                                                 \
+-        xmlErrorPtr error = xmlCtxtGetLastError(ctxt);\
++        const xmlError * error = xmlCtxtGetLastError(ctxt);\
+         int code = (error != NULL) ? error->code : 0; \
+         const char* message = (error != NULL) ? error->message : NULL; \
+         xmlSecError(XMLSEC_ERRORS_HERE,               \
+@@ -227,7 +227,7 @@ extern "C" {
+  */
+ #define xmlSecXsltError(errorFunction, ctxt, errorObject) \
+     {                                                 \
+-        xmlErrorPtr error = xmlGetLastError();        \
++        const xmlError * error = xmlGetLastError();        \
+         int code = (error != NULL) ? error->code : 0; \
+         const char* message = (error != NULL) ? error->message : NULL; \
+         xmlSecError(XMLSEC_ERRORS_HERE,               \
diff --git a/xmlsec1.spec b/xmlsec1.spec
index 1a8219a..c4f58b8 100644
--- a/xmlsec1.spec
+++ b/xmlsec1.spec
@@ -1,11 +1,15 @@
 Summary: Library providing support for "XML Signature" and "XML Encryption" standards
 Name: xmlsec1
 Version: 1.2.37
-Release: 5%{?dist}%{?extra_release}
+Release: 6%{?dist}%{?extra_release}
 Epoch: 1
 License: MIT
 Source0: https://www.aleksey.com/xmlsec/download/xmlsec1-%{version}.tar.gz
 URL: http://www.aleksey.com/xmlsec/
+
+# https://github.com/lsh123/xmlsec/pull/729
+Patch0: 0001-Fix-libxml2-v2.12.0-includes.patch
+
 BuildRequires: make
 BuildRequires: pkgconfig(libxml-2.0) >= 2.8.0
 BuildRequires: pkgconfig(libxslt) >= 1.0.20
@@ -102,6 +106,7 @@ Libraries, includes, etc. for developing XML Security applications with NSS.
 
 %prep
 %setup -q
+%patch -P0 -p1
 
 %build
 autoreconf -vfi
@@ -176,6 +181,9 @@ mv %{buildroot}%{_docdir}/xmlsec1/* __tmp_doc
 %{_libdir}/pkgconfig/xmlsec1-nss.pc
 
 %changelog
+* Wed Dec 13 2023 Yaakov Selkowitz <yselkowi@redhat.com> - 1:1.2.37-6
+- Fix build with libxml2-2.12.0
+
 * Sat Jul 22 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1:1.2.37-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild