1 files changed, 3 insertions, 1 deletions
diff --git a/osp/public/presentation/presentation_connection.h b/osp/public/presentation/presentation_connection.h
index ee0cff1b..4ea37ce7 100644
--- a/osp/public/presentation/presentation_connection.h
+++ b/osp/public/presentation/presentation_connection.h
@@ -62,7 +62,6 @@ class Connection {
   class Delegate {
    public:
     Delegate() = default;
-    virtual ~Delegate() = default;
 
     // State changes.
     virtual void OnConnected() = 0;
@@ -85,6 +84,9 @@ class Connection {
     // A binary message was received.
     virtual void OnBinaryMessage(const std::vector<uint8_t>& data) = 0;
 
+   protected:
+    virtual ~Delegate() = default;
+
    private:
     OSP_DISALLOW_COPY_AND_ASSIGN(Delegate);
   };