diff --git a/ext/xmlreader/php_xmlreader.c b/ext/xmlreader/php_xmlreader.c
--- a/ext/xmlreader/php_xmlreader.c
+++ b/ext/xmlreader/php_xmlreader.c
@@ -1038,7 +1038,7 @@ PHP_METHOD(xmlreader, XML)
 	xmlreader_object *intern = NULL;
 	char *source, *uri = NULL, *encoding = NULL;
 	int resolved_path_len, ret = 0;
-	char *directory=NULL, resolved_path[MAXPATHLEN];
+	char *directory=NULL, resolved_path[MAXPATHLEN + 1];
 	xmlParserInputBufferPtr inputbfr;
 	xmlTextReaderPtr reader;