diff --git a/third_party/blink/renderer/core/xml/xslt_processor.h b/third_party/blink/renderer/core/xml/xslt_processor.h
index d53835e..2eaea31 100644
--- a/third_party/blink/renderer/core/xml/xslt_processor.h
+++ b/third_party/blink/renderer/core/xml/xslt_processor.h
@@ -77,7 +77,7 @@ class XSLTProcessor final : public ScriptWrappable {
 
   void reset();
 
-  static void ParseErrorFunc(void* user_data, xmlError*);
+  static void ParseErrorFunc(void* user_data, const xmlError*);
   static void GenericErrorFunc(void* user_data, const char* msg, ...);
 
   // Only for libXSLT callbacks
diff --git a/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc b/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
index 9c18520..0f2c474 100644
--- a/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
+++ b/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.
 }
 
-void XSLTProcessor::ParseErrorFunc(void* user_data, xmlError* error) {
+void XSLTProcessor::ParseErrorFunc(void* user_data, const xmlError* error) {
   FrameConsole* console = static_cast<FrameConsole*>(user_data);
   if (!console)
     return;