diff --git a/td/telegram/PublicDialogType.h b/td/telegram/PublicDialogType.h
new file mode 100644
index 000000000..0e92584e8
--- /dev/null
+++ b/td/telegram/PublicDialogType.h
@@ -0,0 +1,22 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
+//
+// 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"
+
+namespace td {
+
+enum class PublicDialogType : int32 { HasUsername, IsLocationBased };
+
+inline PublicDialogType get_public_dialog_type(const td_api::object_ptr<td_api::PublicChatType> &type) {
+  if (type == nullptr || type->get_id() == td_api::publicChatTypeHasUsername::ID) {
+    return PublicDialogType::HasUsername;
+  }
+  return PublicDialogType::IsLocationBased;
+}
+
+}  // namespace td