diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index 80afe0acf..3e2662daf 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -3070,20 +3070,16 @@ std::shared_ptr<Td::ResultHandler> Td::extract_handler(uint64 id) {
   return result;
 }
 
-void Td::on_update(BufferSlice &&update, uint64 auth_key_id) {
+void Td::on_update(telegram_api::object_ptr<telegram_api::Updates> updates, uint64 auth_key_id) {
   if (close_flag_ > 1) {
     return;
   }
 
-  TlBufferParser parser(&update);
-  auto ptr = telegram_api::Updates::fetch(parser);
-  parser.fetch_end();
-  if (parser.get_error()) {
-    LOG(ERROR) << "Failed to fetch update: " << parser.get_error() << format::as_hex_dump<4>(update.as_slice());
-    updates_manager_->schedule_get_difference("failed to fetch update");
+  if (updates == nullptr) {
+    updates_manager_->schedule_get_difference("failed to fetch updates");
   } else {
     updates_manager_->on_update_from_auth_key_id(auth_key_id);
-    updates_manager_->on_get_updates(std::move(ptr), Promise<Unit>());
+    updates_manager_->on_get_updates(std::move(updates), Promise<Unit>());
     if (auth_manager_->is_bot() && auth_manager_->is_authorized()) {
       alarm_timeout_.set_timeout_in(PING_SERVER_ALARM_ID,
                                     PING_SERVER_TIMEOUT + Random::fast(0, PING_SERVER_TIMEOUT / 5));
diff --git a/td/telegram/Td.h b/td/telegram/Td.h
index 3afd1b8c8..b4e8ff8a3 100644
--- a/td/telegram/Td.h
+++ b/td/telegram/Td.h
@@ -121,7 +121,7 @@ class Td final : public Actor {
 
   void reload_promo_data();
 
-  void on_update(BufferSlice &&update, uint64 auth_key_id);
+  void on_update(telegram_api::object_ptr<telegram_api::Updates> updates, uint64 auth_key_id);
 
   void on_result(NetQueryPtr query);
 
diff --git a/td/telegram/net/SessionProxy.cpp b/td/telegram/net/SessionProxy.cpp
index 36f4e702e..e46a609c0 100644
--- a/td/telegram/net/SessionProxy.cpp
+++ b/td/telegram/net/SessionProxy.cpp
@@ -14,10 +14,12 @@
 #include "td/telegram/net/Session.h"
 #include "td/telegram/Td.h"
 #include "td/telegram/TdDb.h"
+#include "td/telegram/telegram_api.h"
 #include "td/telegram/UniqueId.h"
 
 #include "td/utils/buffer.h"
 #include "td/utils/common.h"
+#include "td/utils/format.h"
 #include "td/utils/HashTableUtils.h"
 #include "td/utils/logging.h"
 #include "td/utils/Promise.h"
@@ -25,6 +27,7 @@
 #include "td/utils/SliceBuilder.h"
 #include "td/utils/Time.h"
 #include "td/utils/tl_helpers.h"
+#include "td/utils/tl_parsers.h"
 
 namespace td {
 
@@ -63,7 +66,14 @@ class SessionCallback final : public Session::Callback {
   }
 
   void on_update(BufferSlice &&update, uint64 auth_key_id) final {
-    send_closure_later(G()->td(), &Td::on_update, std::move(update), auth_key_id);
+    TlBufferParser parser(&update);
+    auto updates = telegram_api::Updates::fetch(parser);
+    parser.fetch_end();
+    if (parser.get_error()) {
+      LOG(ERROR) << "Failed to fetch update: " << parser.get_error() << format::as_hex_dump<4>(update.as_slice());
+      updates = nullptr;
+    }
+    send_closure_later(G()->td(), &Td::on_update, std::move(updates), auth_key_id);
   }
 
   void on_result(NetQueryPtr query) final {