diff --git a/td/telegram/DialogNotificationSettings.cpp b/td/telegram/DialogNotificationSettings.cpp
index 63bad6abf..315376af9 100644
--- a/td/telegram/DialogNotificationSettings.cpp
+++ b/td/telegram/DialogNotificationSettings.cpp
@@ -120,4 +120,26 @@ bool are_default_dialog_notification_settings(const DialogNotificationSettings &
          settings.use_default_disable_mention_notifications;
 }
 
+NeedUpdateDialogNotificationSettings need_update_dialog_notification_settings(
+    const DialogNotificationSettings *current_settings, const DialogNotificationSettings &new_settings) {
+  NeedUpdateDialogNotificationSettings result;
+  result.need_update_server = current_settings->mute_until != new_settings.mute_until ||
+                              !are_equivalent_notification_sounds(current_settings->sound, new_settings.sound) ||
+                              current_settings->show_preview != new_settings.show_preview ||
+                              current_settings->use_default_mute_until != new_settings.use_default_mute_until ||
+                              current_settings->use_default_show_preview != new_settings.use_default_show_preview;
+  result.need_update_local =
+      current_settings->use_default_disable_pinned_message_notifications !=
+          new_settings.use_default_disable_pinned_message_notifications ||
+      current_settings->disable_pinned_message_notifications != new_settings.disable_pinned_message_notifications ||
+      current_settings->use_default_disable_mention_notifications !=
+          new_settings.use_default_disable_mention_notifications ||
+      current_settings->disable_mention_notifications != new_settings.disable_mention_notifications;
+  result.are_changed = result.need_update_server || result.need_update_local ||
+                       current_settings->is_synchronized != new_settings.is_synchronized ||
+                       current_settings->is_use_default_fixed != new_settings.is_use_default_fixed ||
+                       are_different_equivalent_notification_sounds(current_settings->sound, new_settings.sound);
+  return result;
+}
+
 }  // namespace td
diff --git a/td/telegram/DialogNotificationSettings.h b/td/telegram/DialogNotificationSettings.h
index 1c17c5244..03e8c61b4 100644
--- a/td/telegram/DialogNotificationSettings.h
+++ b/td/telegram/DialogNotificationSettings.h
@@ -69,4 +69,12 @@ DialogNotificationSettings get_dialog_notification_settings(tl_object_ptr<telegr
 
 bool are_default_dialog_notification_settings(const DialogNotificationSettings &settings, bool compare_sound);
 
+struct NeedUpdateDialogNotificationSettings {
+  bool need_update_server = false;
+  bool need_update_local = false;
+  bool are_changed = false;
+};
+NeedUpdateDialogNotificationSettings need_update_dialog_notification_settings(
+    const DialogNotificationSettings *current_settings, const DialogNotificationSettings &new_settings);
+
 }  // namespace td
diff --git a/td/telegram/ForumTopicManager.cpp b/td/telegram/ForumTopicManager.cpp
index 96b4b9c49..449eb3970 100644
--- a/td/telegram/ForumTopicManager.cpp
+++ b/td/telegram/ForumTopicManager.cpp
@@ -448,25 +448,8 @@ bool ForumTopicManager::update_forum_topic_notification_settings(DialogId dialog
     return false;
   }
 
-  bool need_update_server = current_settings->mute_until != new_settings.mute_until ||
-                            !are_equivalent_notification_sounds(current_settings->sound, new_settings.sound) ||
-                            current_settings->show_preview != new_settings.show_preview ||
-                            current_settings->use_default_mute_until != new_settings.use_default_mute_until ||
-                            current_settings->use_default_show_preview != new_settings.use_default_show_preview;
-  bool need_update_local =
-      current_settings->use_default_disable_pinned_message_notifications !=
-          new_settings.use_default_disable_pinned_message_notifications ||
-      current_settings->disable_pinned_message_notifications != new_settings.disable_pinned_message_notifications ||
-      current_settings->use_default_disable_mention_notifications !=
-          new_settings.use_default_disable_mention_notifications ||
-      current_settings->disable_mention_notifications != new_settings.disable_mention_notifications;
-
-  bool is_changed = need_update_server || need_update_local ||
-                    current_settings->is_synchronized != new_settings.is_synchronized ||
-                    current_settings->is_use_default_fixed != new_settings.is_use_default_fixed ||
-                    are_different_equivalent_notification_sounds(current_settings->sound, new_settings.sound);
-
-  if (is_changed) {
+  auto need_update = need_update_dialog_notification_settings(current_settings, new_settings);
+  if (need_update.are_changed) {
     // TODO update unmute timeouts, td_api updates, remove notifications
     *current_settings = std::move(new_settings);
 
@@ -475,7 +458,7 @@ bool ForumTopicManager::update_forum_topic_notification_settings(DialogId dialog
     topic->need_save_to_database_ = true;
     save_topic_to_database(dialog_id, topic);
   }
-  return need_update_server;
+  return need_update.need_update_server;
 }
 
 void ForumTopicManager::get_forum_topic(DialogId dialog_id, MessageId top_thread_message_id,
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 74a03b531..7d8f36ebc 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -8213,25 +8213,8 @@ bool MessagesManager::update_dialog_notification_settings(DialogId dialog_id,
     return false;
   }
 
-  bool need_update_server = current_settings->mute_until != new_settings.mute_until ||
-                            !are_equivalent_notification_sounds(current_settings->sound, new_settings.sound) ||
-                            current_settings->show_preview != new_settings.show_preview ||
-                            current_settings->use_default_mute_until != new_settings.use_default_mute_until ||
-                            current_settings->use_default_show_preview != new_settings.use_default_show_preview;
-  bool need_update_local =
-      current_settings->use_default_disable_pinned_message_notifications !=
-          new_settings.use_default_disable_pinned_message_notifications ||
-      current_settings->disable_pinned_message_notifications != new_settings.disable_pinned_message_notifications ||
-      current_settings->use_default_disable_mention_notifications !=
-          new_settings.use_default_disable_mention_notifications ||
-      current_settings->disable_mention_notifications != new_settings.disable_mention_notifications;
-
-  bool is_changed = need_update_server || need_update_local ||
-                    current_settings->is_synchronized != new_settings.is_synchronized ||
-                    current_settings->is_use_default_fixed != new_settings.is_use_default_fixed ||
-                    are_different_equivalent_notification_sounds(current_settings->sound, new_settings.sound);
-
-  if (is_changed) {
+  auto need_update = need_update_dialog_notification_settings(current_settings, new_settings);
+  if (need_update.are_changed) {
     Dialog *d = get_dialog(dialog_id);
     LOG_CHECK(d != nullptr) << "Wrong " << dialog_id << " in update_dialog_notification_settings";
     bool was_dialog_mentions_disabled = is_dialog_mention_notifications_disabled(d);
@@ -8261,13 +8244,13 @@ bool MessagesManager::update_dialog_notification_settings(DialogId dialog_id,
       }
     }
 
-    if (need_update_server || need_update_local) {
+    if (need_update.need_update_server || need_update.need_update_local) {
       send_closure(G()->td(), &Td::send_update,
                    make_tl_object<td_api::updateChatNotificationSettings>(
                        dialog_id.get(), get_chat_notification_settings_object(current_settings)));
     }
   }
-  return need_update_server;
+  return need_update.need_update_server;
 }
 
 void MessagesManager::schedule_dialog_unmute(DialogId dialog_id, bool use_default, int32 mute_until) {