diff --git a/td/telegram/UpdatesManager.cpp b/td/telegram/UpdatesManager.cpp
index 192647647..88509338f 100644
--- a/td/telegram/UpdatesManager.cpp
+++ b/td/telegram/UpdatesManager.cpp
@@ -108,23 +108,6 @@ namespace td {
 
 int VERBOSITY_NAME(get_difference) = VERBOSITY_NAME(INFO);
 
-class OnUpdate {
-  UpdatesManager *updates_manager_;
-  tl_object_ptr<telegram_api::Update> &update_;
-  mutable Promise<Unit> promise_;
-
- public:
-  OnUpdate(UpdatesManager *updates_manager, tl_object_ptr<telegram_api::Update> &update, Promise<Unit> &&promise)
-      : updates_manager_(updates_manager), update_(update), promise_(std::move(promise)) {
-  }
-
-  template <class T>
-  void operator()(T &obj) const {
-    CHECK(&*update_ == &obj);
-    updates_manager_->on_update(move_tl_object_as<T>(update_), std::move(promise_));
-  }
-};
-
 class GetUpdatesStateQuery final : public Td::ResultHandler {
   Promise<tl_object_ptr<telegram_api::updates_state>> promise_;
 
diff --git a/td/telegram/UpdatesManager.h b/td/telegram/UpdatesManager.h
index 832753936..0ffa2eda2 100644
--- a/td/telegram/UpdatesManager.h
+++ b/td/telegram/UpdatesManager.h
@@ -149,7 +149,23 @@ class UpdatesManager final : public Actor {
   static constexpr bool DROP_PTS_UPDATES = false;
   static constexpr const char *AFTER_GET_DIFFERENCE_SOURCE = "after get difference";
 
-  friend class OnUpdate;
+  class OnUpdate {
+    UpdatesManager *updates_manager_;
+    telegram_api::object_ptr<telegram_api::Update> &update_;
+    mutable Promise<Unit> promise_;
+
+   public:
+    OnUpdate(UpdatesManager *updates_manager, telegram_api::object_ptr<telegram_api::Update> &update,
+             Promise<Unit> &&promise)
+        : updates_manager_(updates_manager), update_(update), promise_(std::move(promise)) {
+    }
+
+    template <class T>
+    void operator()(T &obj) const {
+      CHECK(&*update_ == &obj);
+      updates_manager_->on_update(move_tl_object_as<T>(update_), std::move(promise_));
+    }
+  };
 
   class PendingPtsUpdate {
    public: