diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd4909926..0088248b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -653,6 +653,7 @@ set(TDLIB_SOURCE
   td/telegram/TdDb.h
   td/telegram/TdParameters.h
   td/telegram/TermsOfService.h
+  td/telegram/TopDialogCategory.h
   td/telegram/TopDialogManager.h
   td/telegram/UniqueId.h
   td/telegram/UpdatesManager.h
diff --git a/SplitSource.php b/SplitSource.php
index 6ff66c4e2..16a89fa77 100644
--- a/SplitSource.php
+++ b/SplitSource.php
@@ -281,6 +281,7 @@ function split_file($file, $chunks, $undo) {
                 'secret_chats_manager[_(-][^.]|SecretChatsManager' => 'SecretChatsManager',
                 'stickers_manager[_(-][^.]|StickersManager' => 'StickersManager',
                 '[>](td_db[(][)]|get_td_db_impl[(])|TdDb[^A-Za-z]' => 'TdDb',
+                'TopDialogCategory|top_dialog_category_from_td_api' => 'TopDialogCategory',
                 'top_dialog_manager[_(-][^.]|TopDialogManager' => 'TopDialogManager',
                 'updates_manager[_(-][^.]|UpdatesManager|get_difference[)]' => 'UpdatesManager',
                 'WebPageId(Hash)?' => 'WebPageId',
diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index d847f5bac..e585c04bc 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -35,7 +35,6 @@
 #include "td/telegram/StickersManager.h"
 #include "td/telegram/Td.h"
 #include "td/telegram/TdDb.h"
-#include "td/telegram/TopDialogManager.h"
 #include "td/telegram/UpdatesManager.h"
 #include "td/telegram/Version.h"
 
@@ -7894,13 +7893,6 @@ void ContactsManager::update_user(User *u, UserId user_id, bool from_binlog, boo
 
   if (u->is_deleted) {
     td_->inline_queries_manager_->remove_recent_inline_bot(user_id, Promise<>());
-    /*
-    DialogId dialog_id(user_id);
-    for (auto category : {TopDialogCategory::Correspondent, TopDialogCategory::BotPM, TopDialogCategory::BotInline}) {
-      send_closure(G()->top_dialog_manager(), &TopDialogManager::delete_dialog, category, dialog_id,
-                   get_input_peer_user(user_id, AccessRights::Read));
-    }
-    */
   }
 
   LOG(DEBUG) << "Update " << user_id << ": need_save_to_database = " << u->need_save_to_database
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index a6e4efde8..5c40d678e 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -45,6 +45,7 @@
 #include "td/telegram/SequenceDispatcher.h"
 #include "td/telegram/Td.h"
 #include "td/telegram/TdDb.h"
+#include "td/telegram/TopDialogCategory.h"
 #include "td/telegram/TopDialogManager.h"
 #include "td/telegram/UpdatesManager.h"
 #include "td/telegram/Version.h"
diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index 076316bd1..eafec3245 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -80,6 +80,7 @@
 #include "td/telegram/StickersManager.h"
 #include "td/telegram/StorageManager.h"
 #include "td/telegram/TdDb.h"
+#include "td/telegram/TopDialogCategory.h"
 #include "td/telegram/TopDialogManager.h"
 #include "td/telegram/UpdatesManager.h"
 #include "td/telegram/VideoNotesManager.h"
diff --git a/td/telegram/TopDialogCategory.h b/td/telegram/TopDialogCategory.h
new file mode 100644
index 000000000..f7f08524d
--- /dev/null
+++ b/td/telegram/TopDialogCategory.h
@@ -0,0 +1,48 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+#pragma once
+
+#include "td/telegram/td_api.h"
+
+#include "td/utils/common.h"
+
+namespace td {
+
+enum class TopDialogCategory : int32 {
+  Correspondent,
+  BotPM,
+  BotInline,
+  Group,
+  Channel,
+  Call,
+  ForwardUsers,
+  ForwardChats,
+  Size
+};
+
+inline TopDialogCategory top_dialog_category_from_td_api(const td_api::TopChatCategory &category) {
+  switch (category.get_id()) {
+    case td_api::topChatCategoryUsers::ID:
+      return TopDialogCategory::Correspondent;
+    case td_api::topChatCategoryBots::ID:
+      return TopDialogCategory::BotPM;
+    case td_api::topChatCategoryInlineBots::ID:
+      return TopDialogCategory::BotInline;
+    case td_api::topChatCategoryGroups::ID:
+      return TopDialogCategory::Group;
+    case td_api::topChatCategoryChannels::ID:
+      return TopDialogCategory::Channel;
+    case td_api::topChatCategoryCalls::ID:
+      return TopDialogCategory::Call;
+    case td_api::topChatCategoryForwardChats::ID:
+      return TopDialogCategory::ForwardUsers;
+    default:
+      UNREACHABLE();
+  }
+}
+
+}  // namespace td
diff --git a/td/telegram/TopDialogManager.h b/td/telegram/TopDialogManager.h
index e861896e9..122ff7b33 100644
--- a/td/telegram/TopDialogManager.h
+++ b/td/telegram/TopDialogManager.h
@@ -9,11 +9,11 @@
 #include "td/actor/actor.h"
 #include "td/actor/PromiseFuture.h"
 
-#include "td/telegram/td_api.h"
-#include "td/telegram/telegram_api.h"
-
 #include "td/telegram/DialogId.h"
 #include "td/telegram/net/NetQuery.h"
+#include "td/telegram/td_api.h"
+#include "td/telegram/telegram_api.h"
+#include "td/telegram/TopDialogCategory.h"
 
 #include "td/utils/common.h"
 #include "td/utils/Time.h"
@@ -23,39 +23,6 @@
 
 namespace td {
 
-enum class TopDialogCategory : int32 {
-  Correspondent,
-  BotPM,
-  BotInline,
-  Group,
-  Channel,
-  Call,
-  ForwardUsers,
-  ForwardChats,
-  Size
-};
-
-inline TopDialogCategory top_dialog_category_from_td_api(const td_api::TopChatCategory &category) {
-  switch (category.get_id()) {
-    case td_api::topChatCategoryUsers::ID:
-      return TopDialogCategory::Correspondent;
-    case td_api::topChatCategoryBots::ID:
-      return TopDialogCategory::BotPM;
-    case td_api::topChatCategoryInlineBots::ID:
-      return TopDialogCategory::BotInline;
-    case td_api::topChatCategoryGroups::ID:
-      return TopDialogCategory::Group;
-    case td_api::topChatCategoryChannels::ID:
-      return TopDialogCategory::Channel;
-    case td_api::topChatCategoryCalls::ID:
-      return TopDialogCategory::Call;
-    case td_api::topChatCategoryForwardChats::ID:
-      return TopDialogCategory::ForwardUsers;
-    default:
-      UNREACHABLE();
-  }
-}
-
 class TopDialogManager : public NetQueryCallback {
  public:
   explicit TopDialogManager(ActorShared<> parent) : parent_(std::move(parent)) {