diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 6784ba987..65c3337c8 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -28615,7 +28615,7 @@ void MessagesManager::on_imported_message_attachments_uploaded(int64 random_id,
   td_->create_handler<StartImportHistoryQuery>(std::move(promise))->send(dialog_id, pending_message_import->import_id);
 }
 
-bool MessagesManager::on_update_message_id(int64 random_id, MessageId new_message_id, const string &source) {
+bool MessagesManager::on_update_message_id(int64 random_id, MessageId new_message_id, const char *source) {
   if (!new_message_id.is_valid() && !new_message_id.is_valid_scheduled()) {
     LOG(ERROR) << "Receive " << new_message_id << " in updateMessageId with random_id " << random_id << " from "
                << source;
diff --git a/td/telegram/MessagesManager.h b/td/telegram/MessagesManager.h
index 06fbeaa67..04c8c502e 100644
--- a/td/telegram/MessagesManager.h
+++ b/td/telegram/MessagesManager.h
@@ -262,7 +262,7 @@ class MessagesManager final : public Actor {
   void on_get_common_dialogs(UserId user_id, int64 offset_chat_id, vector<tl_object_ptr<telegram_api::Chat>> &&chats,
                              int32 total_count);
 
-  bool on_update_message_id(int64 random_id, MessageId new_message_id, const string &source);
+  bool on_update_message_id(int64 random_id, MessageId new_message_id, const char *source);
 
   void on_update_dialog_draft_message(DialogId dialog_id, MessageId top_thread_message_id,
                                       tl_object_ptr<telegram_api::DraftMessage> &&draft_message);