diff --git a/example/android/README.md b/example/android/README.md
index 0939ff860..2dfe14c4c 100644
--- a/example/android/README.md
+++ b/example/android/README.md
@@ -15,6 +15,6 @@ If you already have installed Android SDK and NDK, you can skip the second step
 
 If you want to update TDLib to a newer version, you need to run only the script `./build-tdlib.sh`.
 
-You can specify different OpenSSL version as the third parameter to the script `./build-openssl.sh`. By default OpenSSL 1.1.1 is used because of much smaller binary footprint then newer OpenSSL versions.
+You can specify different OpenSSL version as the third parameter to the script `./build-openssl.sh`. By default OpenSSL 1.1.1 is used because of much smaller binary footprint than newer OpenSSL versions.
 
 You can build TDLib against shared standard C++ library by specifying "c++_shared" as the third parameter to the script `./build-tdlib.sh`. This can reduce total app size if you have a lot of other C++ code and want it to use the same shared library.
diff --git a/td/telegram/FileReferenceManager.h b/td/telegram/FileReferenceManager.h
index 0151c4668..c16976624 100644
--- a/td/telegram/FileReferenceManager.h
+++ b/td/telegram/FileReferenceManager.h
@@ -188,7 +188,7 @@ class FileReferenceManager final : public Actor {
 
   FileSourceId get_current_file_source_id() const;
 
-  void tear_down() override;
+  void tear_down() final;
 };
 
 }  // namespace td
diff --git a/td/telegram/StickersManager.cpp b/td/telegram/StickersManager.cpp
index 6804bc81b..23c388681 100644
--- a/td/telegram/StickersManager.cpp
+++ b/td/telegram/StickersManager.cpp
@@ -22,6 +22,7 @@
 #include "td/telegram/Global.h"
 #include "td/telegram/LanguagePackManager.h"
 #include "td/telegram/logevent/LogEvent.h"
+#include "td/telegram/logevent/LogEventHelper.h"
 #include "td/telegram/MessagesManager.h"
 #include "td/telegram/misc.h"
 #include "td/telegram/net/DcId.h"
@@ -3929,7 +3930,7 @@ vector<FileId> StickersManager::get_stickers(StickerType sticker_type, string em
 
   vector<StickerSetId> examined_sticker_set_ids = installed_sticker_set_ids_[type];
   if (!emoji.empty() && sticker_type == StickerType::CustomEmoji) {
-    td::append(examined_sticker_set_ids, featured_sticker_set_ids_[type]);
+    append(examined_sticker_set_ids, featured_sticker_set_ids_[type]);
   }
 
   vector<StickerSetId> sets_to_load;