diff --git a/td/mtproto/Handshake.h b/td/mtproto/Handshake.h
index 952c4ef80..46f0c69c8 100644
--- a/td/mtproto/Handshake.h
+++ b/td/mtproto/Handshake.h
@@ -79,6 +79,10 @@ class AuthKeyHandshake {
 
   void clear();
 
+  const AuthKey &get_auth_key() const {
+    return auth_key_;
+  }
+
   AuthKey release_auth_key() {
     return std::move(auth_key_);
   }
diff --git a/test/mtproto.cpp b/test/mtproto.cpp
index 3a49b2d8f..97a708002 100644
--- a/test/mtproto.cpp
+++ b/test/mtproto.cpp
@@ -564,7 +564,7 @@ class FastPingTestActor : public Actor {
       unique_ptr<mtproto::AuthData> auth_data;
       if (iteration_ % 2 == 0) {
         auth_data = make_unique<mtproto::AuthData>();
-        auth_data->set_tmp_auth_key(handshake_->release_auth_key());
+        auth_data->set_tmp_auth_key(handshake_->get_auth_key());
         auth_data->set_server_time_difference(handshake_->get_server_time_diff());
         auth_data->set_server_salt(handshake_->get_server_salt(), Time::now());
         auth_data->set_future_salts({mtproto::ServerSalt{0u, 1e20, 1e30}}, Time::now());