diff --git a/ext/xmlreader/php_xmlreader.c b/ext/xmlreader/php_xmlreader.c
index 02ebc7738ef..464998ce62f 100644
--- a/ext/xmlreader/php_xmlreader.c
+++ b/ext/xmlreader/php_xmlreader.c
@@ -1320,6 +1320,7 @@ PHP_MINIT_FUNCTION(xmlreader)
 	xmlreader_object_handlers.read_property = xmlreader_read_property;
 	xmlreader_object_handlers.write_property = xmlreader_write_property;
 	xmlreader_object_handlers.get_property_ptr_ptr = xmlreader_get_property_ptr_ptr;
+	xmlreader_object_handlers.clone_obj = NULL;
 
 	INIT_CLASS_ENTRY(ce, "XMLReader", xmlreader_functions);
 	ce.create_object = xmlreader_objects_new;
diff --git a/ext/xmlreader/tests/bug51963.phpt b/ext/xmlreader/tests/bug51963.phpt
new file mode 100644
index 00000000000..af47f9750b2
--- /dev/null
+++ b/ext/xmlreader/tests/bug51963.phpt
@@ -0,0 +1,22 @@
+--TEST--
+Bug #59613 (Crash with clone XMLReader)
+--SKIPIF--
+<?php
+extension_loaded("xmlreader") or die("skip requires xmlreader");
+?>
+--FILE--
+<?php
+echo "Test\n";
+
+$xmlreader = new XMLReader();
+$xmlreader->xml("<a><b/></a>");
+
+$xmlreader->next();
+$xmlreader2 = clone $xmlreader;
+$xmlreader2->next();
+?>
+Done
+--EXPECTF--
+Test
+
+Fatal error: Trying to clone an uncloneable object of class XMLReader in %s on line %d