From fdb54fa2fb3e5099a736d19af144dc474cc80c4b Mon Sep 17 00:00:00 2001
From: gregw <gregw@webtide.com>
Date: Tue, 23 Feb 2021 13:06:50 +0100
Subject: [PATCH] Efficiency improvements for #5977

Improve efficiency for non wrapped response for cache-contro
---
 .../main/java/org/eclipse/jetty/server/ResourceService.java   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceService.java b/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceService.java
index 8ece91dc2f5b..1b85ead9665c 100644
--- a/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceService.java
+++ b/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceService.java
@@ -836,10 +836,10 @@ protected void putHeaders(HttpServletResponse response, HttpContent content, lon
             r.putHeaders(content, contentLength, _etags);
             HttpFields fields = r.getHttpFields();
             if (_acceptRanges && !fields.contains(HttpHeader.ACCEPT_RANGES))
-                    fields.put(ACCEPT_RANGES);
+                    fields.add(ACCEPT_RANGES);
 
             if (_cacheControl != null && !fields.contains(HttpHeader.CACHE_CONTROL))
-                fields.put(_cacheControl);
+                fields.add(_cacheControl);
         }
         else
         {