diff --git a/td/telegram/DownloadManager.cpp b/td/telegram/DownloadManager.cpp
index 5a6b1838d..88c784dc2 100644
--- a/td/telegram/DownloadManager.cpp
+++ b/td/telegram/DownloadManager.cpp
@@ -335,6 +335,7 @@ class DownloadManagerImpl final : public DownloadManager {
       return;
     }
 
+    LOG(INFO) << "File " << file_id << " was viewed from " << file_source_id;
     auto r_file_info_ptr = get_file_info(file_id, file_source_id);
     if (r_file_info_ptr.is_error()) {
       return;
@@ -760,6 +761,7 @@ class DownloadManagerImpl final : public DownloadManager {
       return;
     }
 
+    LOG(INFO) << "Mark download " << download_id << " as viewed";
     unviewed_completed_download_ids_.erase(download_id);
     if (unviewed_completed_download_ids_.empty()) {
       clear_counters();
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 9eaf24971..065c9aa5b 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -20878,6 +20878,7 @@ Status MessagesManager::view_messages(DialogId dialog_id, MessageId top_thread_m
       auto it = full_message_id_to_file_source_id_.find({dialog_id, m->message_id});
       if (it != full_message_id_to_file_source_id_.end()) {
         auto file_source_id = it->second;
+        LOG(INFO) << "Have " << file_source_id << " for " << m->message_id;
         CHECK(file_source_id.is_valid());
         for (auto file_id : get_message_file_ids(m)) {
           auto file_view = td_->file_manager_->get_file_view(file_id);