diff --git a/td/telegram/MessageContent.cpp b/td/telegram/MessageContent.cpp
index 51b704ef0..4bbabbf65 100644
--- a/td/telegram/MessageContent.cpp
+++ b/td/telegram/MessageContent.cpp
@@ -4362,7 +4362,12 @@ unique_ptr<MessageContent> dup_message_content(Td *td, DialogId dialog_id, const
       return std::move(result);
     }
     case MessageContentType::Poll:
-      return make_unique<MessagePoll>(*static_cast<const MessagePoll *>(content));
+      if (type == MessageContentDupType::Copy) {
+        return make_unique<MessagePoll>(
+            td->poll_manager_->dup_poll(static_cast<const MessagePoll *>(content)->poll_id));
+      } else {
+        return make_unique<MessagePoll>(*static_cast<const MessagePoll *>(content));
+      }
     case MessageContentType::Sticker: {
       auto result = make_unique<MessageSticker>(*static_cast<const MessageSticker *>(content));
       if (td->stickers_manager_->has_input_media(result->file_id, to_secret)) {
diff --git a/td/telegram/PollManager.cpp b/td/telegram/PollManager.cpp
index c7e62846c..048f250e1 100644
--- a/td/telegram/PollManager.cpp
+++ b/td/telegram/PollManager.cpp
@@ -576,6 +576,10 @@ td_api::object_ptr<td_api::poll> PollManager::get_poll_object(PollId poll_id, co
       open_period = close_date - now;
     }
   }
+  if (poll->is_closed) {
+    open_period = 0;
+    close_date = 0;
+  }
   return td_api::make_object<td_api::poll>(
       poll_id.get(), poll->question, std::move(poll_options), total_voter_count,
       td_->contacts_manager_->get_user_ids_object(poll->recent_voter_user_ids, "get_poll_object"), poll->is_anonymous,
@@ -1246,6 +1250,18 @@ void PollManager::on_online() {
   }
 }
 
+PollId PollManager::dup_poll(PollId poll_id) {
+  auto poll = get_poll(poll_id);
+  CHECK(poll != nullptr);
+
+  auto question = poll->question;
+  auto options = transform(poll->options, [](auto &option) { return option.text; });
+  auto explanation = poll->explanation;
+  return create_poll(std::move(question), std::move(options), poll->is_anonymous, poll->allow_multiple_answers,
+                     poll->is_quiz, poll->correct_option_id, std::move(explanation), poll->open_period,
+                     poll->open_period == 0 ? 0 : G()->unix_time(), false);
+}
+
 bool PollManager::has_input_media(PollId poll_id) const {
   auto poll = get_poll(poll_id);
   CHECK(poll != nullptr);
@@ -1346,6 +1362,7 @@ PollId PollManager::on_get_poll(PollId poll_id, tl_object_ptr<telegram_api::poll
 
   auto poll = get_poll_force(poll_id);
   bool is_changed = false;
+  bool need_save_to_database = false;
   if (poll == nullptr) {
     if (poll_server == nullptr) {
       LOG(INFO) << "Ignore " << poll_id << ", because have no data about it";
@@ -1428,13 +1445,16 @@ PollId PollManager::on_get_poll(PollId poll_id, tl_object_ptr<telegram_api::poll
     }
     if (open_period != poll->open_period) {
       poll->open_period = open_period;
-      is_changed = true;
+      if (!poll->is_closed) {
+        is_changed = true;
+      } else {
+        need_save_to_database = true;
+      }
     }
     if (close_date != poll->close_date) {
       poll->close_date = close_date;
-      is_changed = true;
-
       if (!poll->is_closed) {
+        is_changed = true;
         if (close_date != 0) {
           if (close_date <= G()->server_time()) {
             poll->is_closed = true;
@@ -1444,6 +1464,8 @@ PollId PollManager::on_get_poll(PollId poll_id, tl_object_ptr<telegram_api::poll
         } else {
           close_poll_timeout_.cancel_timeout(poll_id.get());
         }
+      } else {
+        need_save_to_database = true;
       }
     }
     bool is_anonymous = (poll_server->flags_ & telegram_api::poll::PUBLIC_VOTERS_MASK) == 0;
@@ -1608,6 +1630,8 @@ PollId PollManager::on_get_poll(PollId poll_id, tl_object_ptr<telegram_api::poll
   }
   if (is_changed) {
     notify_on_poll_update(poll_id);
+  }
+  if (is_changed || need_save_to_database) {
     save_poll(poll, poll_id);
   }
   if (need_update_poll && (is_changed || (poll->is_closed && being_closed_polls_.erase(poll_id) != 0))) {
diff --git a/td/telegram/PollManager.h b/td/telegram/PollManager.h
index c26ab5a59..1b415a939 100644
--- a/td/telegram/PollManager.h
+++ b/td/telegram/PollManager.h
@@ -70,6 +70,8 @@ class PollManager final : public Actor {
 
   void stop_local_poll(PollId poll_id);
 
+  PollId dup_poll(PollId poll_id);
+
   bool has_input_media(PollId poll_id) const;
 
   tl_object_ptr<telegram_api::InputMedia> get_input_media(PollId poll_id) const;