--- a/plugins/mod_http.lua	Fri May 14 05:49:35 2021 +0200
+++ b/plugins/mod_http.lua	Sat Jun 10 12:18:09 2023 +0200
@@ -115,7 +115,7 @@
 end
 
 local function header_set_tostring(header_value)
-	return array(pairs(header_value._items)):concat(", ");
+	return array(header_value:items()):concat(", ");
 end
 
 local function apply_cors_headers(response, methods, headers, max_age, allow_credentials, allowed_origins, origin)