diff --git a/0001-Fix-building-with-system-libxml2.patch b/0001-Fix-building-with-system-libxml2.patch
new file mode 100644
index 0000000..d802c6c
--- /dev/null
+++ b/0001-Fix-building-with-system-libxml2.patch
@@ -0,0 +1,53 @@
+From 159dff274a7f32f9b53711df6a5b6fbae8c64b4a Mon Sep 17 00:00:00 2001
+From: Martin Negyokru <negyokru@inf.u-szeged.hu>
+Date: Thu, 7 Dec 2023 15:37:53 +0100
+Subject: [PATCH] Fix building with system libxml2
+
+Libxml2 2.12.0 has changed the const-ness of the
+xmlError pointers, which results in a build error.
+
+Pick-to: 112-based 108-based 87-based
+Change-Id: Id86fcfbfe004f89109808b9bdb11c01133553884
+Reviewed-on: https://codereview.qt-project.org/c/qt/qtwebengine-chromium/+/523633
+Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
+---
+ .../third_party/blink/renderer/core/xml/xslt_processor.h     | 5 +++++
+ .../blink/renderer/core/xml/xslt_processor_libxslt.cc        | 4 ++++
+ 2 files changed, 9 insertions(+)
+
+diff --git a/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor.h b/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor.h
+index d53835e9675..72536e4fd7d 100644
+--- a/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor.h
++++ b/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor.h
+@@ -79,7 +79,12 @@ class XSLTProcessor final : public ScriptWrappable {
+
+   void reset();
+
++#if LIBXML_VERSION >= 21200
++  static void ParseErrorFunc(void* user_data, const xmlError*);
++#else
+   static void ParseErrorFunc(void* user_data, xmlError*);
++#endif
++
+   static void GenericErrorFunc(void* user_data, const char* msg, ...);
+
+   // Only for libXSLT callbacks
+diff --git a/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc b/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
+index 133e0b3355d..e8e6a09f485 100644
+--- a/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
++++ b/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
+@@ -60,7 +60,11 @@ void XSLTProcessor::GenericErrorFunc(void*, const char*, ...) {
+   // It would be nice to do something with this error message.
+ }
+
++#if LIBXML_VERSION >= 21200
++void XSLTProcessor::ParseErrorFunc(void* user_data, const xmlError* error) {
++#else
+ void XSLTProcessor::ParseErrorFunc(void* user_data, xmlError* error) {
++#endif
+   FrameConsole* console = static_cast<FrameConsole*>(user_data);
+   if (!console)
+     return;
+-- 
+2.44.0
+
diff --git a/libqt5-qtwebengine.changes b/libqt5-qtwebengine.changes
index 50730ef..1f2b381 100644
--- a/libqt5-qtwebengine.changes
+++ b/libqt5-qtwebengine.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Apr 19 14:57:37 UTC 2024 - Christophe Marin <christophe@krop.fr>
+
+- Add patch to fix build with libxml >= 2.12:
+  * 0001-Fix-building-with-system-libxml2.patch
+
 -------------------------------------------------------------------
 Sat Feb 24 11:06:56 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/libqt5-qtwebengine.spec b/libqt5-qtwebengine.spec
index ed4e095..2e08e73 100644
--- a/libqt5-qtwebengine.spec
+++ b/libqt5-qtwebengine.spec
@@ -62,6 +62,8 @@ Patch5:         qtwebengine-python3.patch
 Patch6:         sandbox_futex_time64.patch
 # PATCH-FIX-UPSTREAM -- python 3.11 fixes
 Patch7:         python311-fixes.patch
+# PATCH-FIX-UPSTREAM -- libxml 2.12 support
+Patch8:         0001-Fix-building-with-system-libxml2.patch
 ### Patch 50-99 are applied conditionally
 # PATCH-FIX-OPENSUSE -- allow building qtwebengine with ffmpeg5
 Patch50:        qtwebengine-ffmpeg5.patch
@@ -297,6 +299,7 @@ Examples for the libqt5-qtpdf module.
 %patch -P5 -p1
 %patch -P6 -p1
 %patch -P7 -p1
+%patch -P8 -p1
 
 # Replace the whole catapult folder rather than picking individual changes
 pushd src/3rdparty/chromium/third_party