diff --git a/benchmark/bench_misc.cpp b/benchmark/bench_misc.cpp
index 2c5113dab..5260d24fc 100644
--- a/benchmark/bench_misc.cpp
+++ b/benchmark/bench_misc.cpp
@@ -47,7 +47,7 @@ class F {
 };
 
 BENCH(Call, "TL Call") {
-  tl_object_ptr<telegram_api::Function> x = make_tl_object<telegram_api::account_getWallPapers>();
+  tl_object_ptr<telegram_api::Function> x = make_tl_object<telegram_api::account_getWallPapers>(0);
   uint32 res = 0;
   F f(res);
   for (int i = 0; i < n; i++) {
diff --git a/td/generate/tl_writer_td.cpp b/td/generate/tl_writer_td.cpp
index c3d9ac95d..93f16749e 100644
--- a/td/generate/tl_writer_td.cpp
+++ b/td/generate/tl_writer_td.cpp
@@ -49,6 +49,10 @@ bool TD_TL_writer::is_combinator_supported(const tl::tl_combinator *constructor)
   return true;
 }
 
+bool TD_TL_writer::is_default_constructor_generated(const tl::tl_combinator *t) const {
+  return tl_name == "td_api" || t->var_count > 0 || t->args.empty();
+}
+
 int TD_TL_writer::get_storer_type(const tl::tl_combinator *t, const std::string &storer_name) const {
   return storer_name == "TlStorerToString";
 }
diff --git a/td/generate/tl_writer_td.h b/td/generate/tl_writer_td.h
index e630a3b05..c8d59517a 100644
--- a/td/generate/tl_writer_td.h
+++ b/td/generate/tl_writer_td.h
@@ -35,6 +35,7 @@ class TD_TL_writer : public tl::TL_writer {
   bool is_built_in_complex_type(const std::string &name) const override;
   bool is_type_bare(const tl::tl_type *t) const override;
   bool is_combinator_supported(const tl::tl_combinator *constructor) const override;
+  bool is_default_constructor_generated(const tl::tl_combinator *t) const override;
 
   int get_storer_type(const tl::tl_combinator *t, const std::string &storer_name) const override;
   Mode get_parser_mode(int type) const override;
diff --git a/td/mtproto/crypto.cpp b/td/mtproto/crypto.cpp
index 2263477e5..fc21d1900 100644
--- a/td/mtproto/crypto.cpp
+++ b/td/mtproto/crypto.cpp
@@ -77,12 +77,10 @@ Result<RSA> RSA::from_pem(Slice pem) {
 }
 
 int64 RSA::get_fingerprint() const {
-  mtproto_api::rsa_public_key public_key;
   // string objects are necessary, because mtproto_api::rsa_public_key contains Slice inside
   string n_str = n_.to_binary();
   string e_str = e_.to_binary();
-  public_key.n_ = n_str;
-  public_key.e_ = e_str;
+  mtproto_api::rsa_public_key public_key(n_str, e_str);
   size_t size = tl_calc_length(public_key);
   std::vector<unsigned char> tmp(size);
   size = tl_store_unsafe(public_key, tmp.data());
diff --git a/td/telegram/PasswordManager.cpp b/td/telegram/PasswordManager.cpp
index 94c86f238..872cc616f 100644
--- a/td/telegram/PasswordManager.cpp
+++ b/td/telegram/PasswordManager.cpp
@@ -744,7 +744,7 @@ void PasswordManager::get_ton_wallet_password_salt(Promise<td_api::object_ptr<td
 
   get_ton_wallet_password_salt_queries_.push_back(std::move(promise));
   if (get_ton_wallet_password_salt_queries_.size() == 1) {
-    send_with_promise(G()->net_query_creator().create(create_storer(telegram_api::wallet_getKeySecretSalt())),
+    send_with_promise(G()->net_query_creator().create(create_storer(telegram_api::wallet_getKeySecretSalt(false))),
                       PromiseCreator::lambda([actor_id = actor_id(this)](Result<NetQueryPtr> r_query) mutable {
                         auto r_result = fetch_result<telegram_api::wallet_getKeySecretSalt>(std::move(r_query));
                         send_closure(actor_id, &PasswordManager::on_get_ton_wallet_password_salt, std::move(r_result));
diff --git a/td/telegram/SecretChatActor.cpp b/td/telegram/SecretChatActor.cpp
index f116bc881..7428cb47a 100644
--- a/td/telegram/SecretChatActor.cpp
+++ b/td/telegram/SecretChatActor.cpp
@@ -470,7 +470,7 @@ void SecretChatActor::notify_screenshot_taken(Promise<> promise) {
     promise.set_error(Status::Error(400, "Can't access the chat"));
     return;
   }
-  send_action(make_tl_object<secret_api::decryptedMessageActionScreenshotMessages>(), SendFlag::Push,
+  send_action(make_tl_object<secret_api::decryptedMessageActionScreenshotMessages>(vector<int64>()), SendFlag::Push,
               std::move(promise));
 }
 
@@ -565,10 +565,8 @@ Status SecretChatActor::run_auth() {
         return Status::OK();
       }
       // messages.requestEncryption#f64daf43 user_id:InputUser random_id:int g_a:bytes = EncryptedChat;
-      telegram_api::messages_requestEncryption tl_query;
-      tl_query.user_id_ = get_input_user();
-      tl_query.random_id_ = auth_state_.random_id;
-      tl_query.g_a_ = BufferSlice(auth_state_.handshake.get_g_b());
+      telegram_api::messages_requestEncryption tl_query(get_input_user(), auth_state_.random_id,
+                                                        BufferSlice(auth_state_.handshake.get_g_b()));
       auto query = context_->net_query_creator().create(
           UniqueId::next(UniqueId::Type::Default, static_cast<uint8>(QueryType::EncryptedChat)),
           create_storer(tl_query));
@@ -584,12 +582,9 @@ Status SecretChatActor::run_auth() {
       auto id_and_key = auth_state_.handshake.gen_key();
       pfs_state_.auth_key = mtproto::AuthKey(id_and_key.first, std::move(id_and_key.second));
       calc_key_hash();
-      // messages.acceptEncryption#3dbc0415 peer:InputEncryptedChat g_b:bytes key_fingerprint:long =
-      // EncryptedChat;
-      telegram_api::messages_acceptEncryption tl_query;
-      tl_query.peer_ = get_input_chat();
-      tl_query.g_b_ = BufferSlice(auth_state_.handshake.get_g_b());
-      tl_query.key_fingerprint_ = pfs_state_.auth_key.id();
+      // messages.acceptEncryption#3dbc0415 peer:InputEncryptedChat g_b:bytes key_fingerprint:long = EncryptedChat;
+      telegram_api::messages_acceptEncryption tl_query(get_input_chat(), BufferSlice(auth_state_.handshake.get_g_b()),
+                                                       pfs_state_.auth_key.id());
       auto query = context_->net_query_creator().create(
           UniqueId::next(UniqueId::Type::Default, static_cast<uint8>(QueryType::EncryptedChat)),
           create_storer(tl_query));
diff --git a/td/telegram/StickersManager.cpp b/td/telegram/StickersManager.cpp
index e2d27dd6c..fbee4de4a 100644
--- a/td/telegram/StickersManager.cpp
+++ b/td/telegram/StickersManager.cpp
@@ -1695,7 +1695,7 @@ SecretInputMedia StickersManager::get_secret_input_media(FileId sticker_file_id,
     return SecretInputMedia{nullptr, make_tl_object<secret_api::decryptedMessageMediaExternalDocument>(
                                          remote_location.get_id(), remote_location.get_access_hash(), 0 /*date*/,
                                          get_sticker_mime_type(sticker), narrow_cast<int32>(file_view.size()),
-                                         make_tl_object<secret_api::photoSizeEmpty>(),
+                                         make_tl_object<secret_api::photoSizeEmpty>("t"),
                                          remote_location.get_dc_id().get_raw_id(), std::move(attributes))};
   }
 }
diff --git a/tdtl/td/tl/tl_generate.cpp b/tdtl/td/tl/tl_generate.cpp
index aa107f1f2..e3072ceaa 100644
--- a/tdtl/td/tl/tl_generate.cpp
+++ b/tdtl/td/tl/tl_generate.cpp
@@ -252,7 +252,9 @@ static void write_function(tl_outputer &out, const tl_combinator *t, const std::
   std::vector<var_description> vars(t->var_count);
   out.append(w.gen_function_vars(t, vars));
 
-  write_class_constructor(out, t, class_name, true, w);
+  if (w.is_default_constructor_generated(t)) {
+    write_class_constructor(out, t, class_name, true, w);
+  }
   if (required_args) {
     write_class_constructor(out, t, class_name, false, w);
   }
@@ -303,7 +305,9 @@ static void write_constructor(tl_outputer &out, const tl_combinator *t, const st
   int required_args = gen_field_definitions(out, t, class_name, w);
   out.append(w.gen_flags_definitions(t));
 
-  write_class_constructor(out, t, class_name, true, w);
+  if (w.is_default_constructor_generated(t)) {
+    write_class_constructor(out, t, class_name, true, w);
+  }
   if (required_args) {
     write_class_constructor(out, t, class_name, false, w);
   }
diff --git a/tdtl/td/tl/tl_writer.cpp b/tdtl/td/tl/tl_writer.cpp
index 5e80315aa..0a9131ecb 100644
--- a/tdtl/td/tl/tl_writer.cpp
+++ b/tdtl/td/tl/tl_writer.cpp
@@ -135,6 +135,10 @@ bool TL_writer::is_documentation_generated() const {
   return false;
 }
 
+bool TL_writer::is_default_constructor_generated(const tl_combinator *t) const {
+  return true;
+}
+
 std::string TL_writer::gen_main_class_name(const tl_type *t) const {
   if (t->simple_constructors == 1) {
     for (std::size_t i = 0; i < t->constructors_num; i++) {
diff --git a/tdtl/td/tl/tl_writer.h b/tdtl/td/tl/tl_writer.h
index 8c243dfa0..b6abbc2f2 100644
--- a/tdtl/td/tl/tl_writer.h
+++ b/tdtl/td/tl/tl_writer.h
@@ -56,6 +56,7 @@ class TL_writer {
   virtual bool is_type_bare(const tl_type *t) const = 0;
   virtual bool is_combinator_supported(const tl_combinator *constructor) const;
   virtual bool is_documentation_generated() const;
+  virtual bool is_default_constructor_generated(const tl_combinator *t) const;
 
   virtual int get_parser_type(const tl_combinator *t, const std::string &parser_name) const;
   virtual int get_storer_type(const tl_combinator *t, const std::string &storer_name) const;