diff --git a/src/h2load.h b/src/h2load.h
index 2d18fbf8..061c776f 100644
--- a/src/h2load.h
+++ b/src/h2load.h
@@ -317,13 +317,6 @@ struct Stream {
   Stream();
 };
 
-struct Crypto {
-  Crypto() : datalen(0), acked_offset(0) {}
-  std::array<uint8_t, 1024> data;
-  size_t datalen;
-  size_t acked_offset;
-};
-
 struct Client {
   DefaultMemchunks wb;
   std::unordered_map<int32_t, Stream> streams;
@@ -338,8 +331,6 @@ struct Client {
     ev_timer pkt_timer;
     ngtcp2_conn *conn;
     quic::Error last_error;
-    // Client never send CRYPTO in Short packet.
-    std::array<Crypto, 2> crypto;
     size_t max_pktlen;
     bool close_requested;
     FILE *qlog_file;
diff --git a/src/h2load_quic.cc b/src/h2load_quic.cc
index 17f4f73c..a9709177 100644
--- a/src/h2load_quic.cc
+++ b/src/h2load_quic.cc
@@ -325,7 +325,6 @@ int Client::quic_init(const sockaddr *local_addr, socklen_t local_addrlen,
       ngtcp2_crypto_decrypt_cb,
       ngtcp2_crypto_hp_mask_cb,
       h2load::recv_stream_data,
-      nullptr, // acked_crypto_offset
       h2load::acked_stream_data_offset,
       nullptr, // stream_open
       h2load::stream_close,
@@ -499,14 +498,8 @@ void Client::quic_set_tls_alert(uint8_t alert) {
 void Client::quic_write_client_handshake(ngtcp2_crypto_level level,
                                          const uint8_t *data, size_t datalen) {
   assert(level < 2);
-  auto &crypto = quic.crypto[level];
-  assert(crypto.data.size() >= crypto.datalen + datalen);
 
-  auto p = std::begin(crypto.data) + crypto.datalen;
-  std::copy_n(data, datalen, p);
-  crypto.datalen += datalen;
-
-  ngtcp2_conn_submit_crypto_data(quic.conn, level, p, datalen);
+  ngtcp2_conn_submit_crypto_data(quic.conn, level, data, datalen);
 }
 
 void quic_pkt_timeout_cb(struct ev_loop *loop, ev_timer *w, int revents) {