diff --git a/desktop/toolkit/qt6/qt6-webengine/files/libxml-2.12.patch b/desktop/toolkit/qt6/qt6-webengine/files/libxml-2.12.patch
index 057a7c82ce..33b8a5d1db 100644
--- a/desktop/toolkit/qt6/qt6-webengine/files/libxml-2.12.patch
+++ b/desktop/toolkit/qt6/qt6-webengine/files/libxml-2.12.patch
@@ -1,26 +1,39 @@
-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 d53835e9675793..2eaea31ed29b90 100644
+Patch status: fixed in >=chromium-121.0.6104.0 with caveat
+
+Fix build failure[1] with libxml2-2.12 due xmlError changes.
+
+For convenience, use LIBXML_VERSION like webkit did[2] rather than
+chromium's upstream fix[3] which relies on bundled libxml2 always
+being 2.12.x (spares having to use has_version).
+
+When fix lands in qtwebengine, will need to depend on >=libxml2-2.12
+unless Qt decides to do something different considering that cmake
+uses system libxml2 by default and it may be too early to enforce it.
+
+[1] https://bugs.gentoo.org/917601
+[2] https://github.com/WebKit/WebKit/commit/1bad176b2496579d760852c80cff3ad9fb7c3a4b
+[3] https://crrev.com/871f8ae9b65ce2679b0bc0be36902d65edf0c1e4
 --- 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
-@@ -77,7 +77,7 @@ class XSLTProcessor final : public ScriptWrappable {
- 
+@@ -78,5 +78,9 @@
    void reset();
- 
--  static void ParseErrorFunc(void* user_data, xmlError*);
+
++#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 133e0b3355d2f0..f424077089da87 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
-@@ -66,7 +66,7 @@ void XSLTProcessor::GenericErrorFunc(void*, const char*, ...) {
-   // It would be nice to do something with this error message.
+@@ -67,5 +67,9 @@
  }
- 
--void XSLTProcessor::ParseErrorFunc(void* user_data, xmlError* error) {
+
++#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;