diff --git a/codec-http2/src/main/java/io/netty/handler/codec/http2/Http2FrameCodec.java b/codec-http2/src/main/java/io/netty/handler/codec/http2/Http2FrameCodec.java
index d5fa7582e9..7265a4efcc 100644
--- a/codec-http2/src/main/java/io/netty/handler/codec/http2/Http2FrameCodec.java
+++ b/codec-http2/src/main/java/io/netty/handler/codec/http2/Http2FrameCodec.java
@@ -675,7 +675,7 @@ public class Http2FrameCodec extends Http2ConnectionHandler {
     static class DefaultHttp2FrameStream implements Http2FrameStream {
 
         private volatile int id = -1;
-        volatile Http2Stream stream;
+        private volatile Http2Stream stream;
 
         final Http2FrameStreamEvent stateChanged = Http2FrameStreamEvent.stateChanged(this);
         final Http2FrameStreamEvent writabilityChanged = Http2FrameStreamEvent.writabilityChanged(this);