diff --git a/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceCache.java b/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceCache.java
index 9cd68a401c0..c41ee2b03b8 100644
--- a/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceCache.java
+++ b/jetty-server/src/main/java/org/eclipse/jetty/server/ResourceCache.java
@@ -486,7 +486,7 @@ public class ResourceCache
             }
             if (buffer==null)
                 return null;
-            return buffer.asReadOnlyBuffer();
+            return buffer.slice();
         }