diff --git a/quic/quartc/quartc_session.h b/quic/quartc/quartc_session.h
index 29e6306..9da306e 100644
--- a/quic/quartc/quartc_session.h
+++ b/quic/quartc/quartc_session.h
@@ -67,6 +67,7 @@
   bool ShouldKeepConnectionAlive() const override;
 
   void OnCanWrite() override;
+  bool SendProbingData() override;
 
   void OnConnectionClosed(QuicErrorCode error,
                           const std::string& error_details,