diff --git a/td/telegram/NotificationSettings.cpp b/td/telegram/NotificationSettings.cpp
index f077a3bb..f3fb7d49 100644
--- a/td/telegram/NotificationSettings.cpp
+++ b/td/telegram/NotificationSettings.cpp
@@ -121,12 +121,16 @@ DialogNotificationSettings get_dialog_notification_settings(tl_object_ptr<telegr
   bool use_default_sound = (settings->flags_ & telegram_api::peerNotifySettings::SOUND_MASK) == 0;
   bool use_default_show_preview = (settings->flags_ & telegram_api::peerNotifySettings::SHOW_PREVIEWS_MASK) == 0;
   auto mute_until = use_default_mute_until || settings->mute_until_ <= G()->unix_time() ? 0 : settings->mute_until_;
+  auto sound = std::move(settings->sound_);
+  if (sound.empty()) {
+    sound = "default";
+  }
   bool silent_send_message =
       (settings->flags_ & telegram_api::peerNotifySettings::SILENT_MASK) == 0 ? false : settings->silent_;
   return {use_default_mute_until,
           mute_until,
           use_default_sound,
-          std::move(settings->sound_),
+          std::move(sound),
           use_default_show_preview,
           settings->show_previews_,
           silent_send_message,
@@ -143,8 +147,10 @@ ScopeNotificationSettings get_scope_notification_settings(tl_object_ptr<telegram
                             settings->mute_until_ <= G()->unix_time()
                         ? 0
                         : settings->mute_until_;
-  auto sound =
-      (settings->flags_ & telegram_api::peerNotifySettings::SOUND_MASK) == 0 ? "default" : std::move(settings->sound_);
+  auto sound = std::move(settings->sound_);
+  if (sound.empty()) {
+    sound = "default";
+  }
   auto show_preview =
       (settings->flags_ & telegram_api::peerNotifySettings::SHOW_PREVIEWS_MASK) == 0 ? false : settings->show_previews_;
   return {mute_until, std::move(sound), show_preview, old_disable_pinned_message_notifications,