diff --git a/quic/test_tools/quic_framer_peer.h b/quic/test_tools/quic_framer_peer.h
index 7a09a92..8496718 100644
--- a/quic/test_tools/quic_framer_peer.h
+++ b/quic/test_tools/quic_framer_peer.h
@@ -25,6 +25,9 @@
   static void SetLastSerializedServerConnectionId(
       QuicFramer* framer,
       QuicConnectionId server_connection_id);
+  static void SetLastSerializedClientConnectionId(
+      QuicFramer* framer,
+      QuicConnectionId client_connection_id);
   static void SetLargestPacketNumber(QuicFramer* framer,
                                      QuicPacketNumber packet_number);
   static void SetPerspective(QuicFramer* framer, Perspective perspective);