--- libxslt-1.1.39/tests/runtest.c.old	2023-11-16 12:36:28.000000000 +0000
+++ libxslt-1.1.39/tests/runtest.c	2024-05-05 16:25:22.656618600 +0000
@@ -269,7 +269,7 @@ xmlParserPrintFileContextInternal(xmlPar
 }
 
 static void
-testStructuredErrorHandler(void *ctx ATTRIBUTE_UNUSED, const xmlError *err) {
+testStructuredErrorHandler(void *ctx ATTRIBUTE_UNUSED, xmlError *err) {
     char *file = NULL;
     int line = 0;
     int code = -1;