--- a/ext/libxml/libxml.c	2022-10-31 11:36:06.000000000 +0100
+++ b/ext/libxml/libxml.c	2025-11-30 15:42:29.120131253 +0100
@@ -476,7 +476,7 @@
 static xmlOutputBufferPtr
 php_libxml_output_buffer_create_filename(const char *URI,
                               xmlCharEncodingHandlerPtr encoder,
-                              int compression ATTRIBUTE_UNUSED)
+                              int)
 {
 	xmlOutputBufferPtr ret;
 	xmlURIPtr puri;