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 3f1f86ef17e..6ff4cfe0874 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
@@ -75,6 +75,7 @@ public class ResourceCache
         _cachedFiles=new AtomicInteger();
         _mimeTypes=mimeTypes;
         _parent=parent;
+        _useFileMappedBuffer=useFileMappedBuffer;
         _etagSupported=etags;
     }