1 files changed, 6 insertions, 2 deletions
diff --git a/osp/impl/quic/quic_connection.h b/osp/impl/quic/quic_connection.h
index e00e25a0..6fbc81af 100644
--- a/osp/impl/quic/quic_connection.h
+++ b/osp/impl/quic/quic_connection.h
@@ -17,12 +17,14 @@ class QuicStream {
  public:
   class Delegate {
    public:
-    virtual ~Delegate() = default;
 
     virtual void OnReceived(QuicStream* stream,
                             const char* data,
                             size_t data_size) = 0;
     virtual void OnClose(uint64_t stream_id) = 0;
+
+   protected:
+    virtual ~Delegate() = default;
   };
 
   QuicStream(Delegate* delegate, uint64_t id) : delegate_(delegate), id_(id) {}
@@ -41,7 +43,6 @@ class QuicConnection : public UdpSocket::Client {
  public:
   class Delegate {
    public:
-    virtual ~Delegate() = default;
 
     // Called when the QUIC handshake has successfully completed.
     virtual void OnCryptoHandshakeComplete(uint64_t connection_id) = 0;
@@ -63,6 +64,9 @@ class QuicConnection : public UdpSocket::Client {
     // will be returned via OnIncomingStream immediately after this call.
     virtual QuicStream::Delegate* NextStreamDelegate(uint64_t connection_id,
                                                      uint64_t stream_id) = 0;
+
+   protected:
+    virtual ~Delegate() = default;
   };
 
   explicit QuicConnection(Delegate* delegate) : delegate_(delegate) {}