diff --git a/quic/test_tools/quic_packet_creator_peer.h b/quic/test_tools/quic_packet_creator_peer.h
index 7cf11e6..0fa962c 100644
--- a/quic/test_tools/quic_packet_creator_peer.h
+++ b/quic/test_tools/quic_packet_creator_peer.h
@@ -36,8 +36,7 @@
                                QuicPacketHeader* header);
   static void CreateStreamFrame(QuicPacketCreator* creator,
                                 QuicStreamId id,
-                                size_t write_length,
-                                size_t iov_offset,
+                                size_t data_length,
                                 QuicStreamOffset offset,
                                 bool fin,
                                 QuicFrame* frame);