diff --git a/quic/test_tools/quic_connection_peer.h b/quic/test_tools/quic_connection_peer.h
index 3ded2e0..b7140de 100644
--- a/quic/test_tools/quic_connection_peer.h
+++ b/quic/test_tools/quic_connection_peer.h
@@ -133,6 +133,8 @@
   static void SendConnectionClosePacket(QuicConnection* connection,
                                         QuicErrorCode error,
                                         const std::string& details);
+
+  static size_t GetNumEncryptionLevels(QuicConnection* connection);
 };
 
 }  // namespace test