diff --git a/quic/quartc/quartc_stream_test.cc b/quic/quartc/quartc_stream_test.cc
index fd4c578..d0a527c 100644
--- a/quic/quartc/quartc_stream_test.cc
+++ b/quic/quartc/quartc_stream_test.cc
@@ -77,11 +77,13 @@
   ~MockQuicSession() override {}
 
   // Writes outgoing data from QuicStream to a string.
-  QuicConsumedData WritevData(QuicStreamId id,
-                              size_t write_length,
-                              QuicStreamOffset offset,
-                              StreamSendingState state,
-                              bool /*is_retransmission*/) override {
+  QuicConsumedData WritevData(
+      QuicStreamId id,
+      size_t write_length,
+      QuicStreamOffset offset,
+      StreamSendingState state,
+      bool /*is_retransmission*/,
+      quiche::QuicheOptional<EncryptionLevel> /*level*/) override {
     if (!writable_) {
       return QuicConsumedData(0, false);
     }