diff --git a/td/telegram/files/FileManager.cpp b/td/telegram/files/FileManager.cpp
index 2394c798..19240136 100644
--- a/td/telegram/files/FileManager.cpp
+++ b/td/telegram/files/FileManager.cpp
@@ -5,9 +5,11 @@
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 #include "td/telegram/files/FileManager.h"
+
 #include "td/telegram/telegram_api.h"
 
 #include "td/telegram/ConfigShared.h"
+#include "td/telegram/files/FileDb.h"
 #include "td/telegram/files/FileLoaderUtils.h"
 #include "td/telegram/files/FileLocation.h"
 #include "td/telegram/Global.h"
diff --git a/td/telegram/files/FileManager.h b/td/telegram/files/FileManager.h
index 0a24f7a0..8dc1701d 100644
--- a/td/telegram/files/FileManager.h
+++ b/td/telegram/files/FileManager.h
@@ -10,7 +10,6 @@
 #include "td/telegram/telegram_api.h"
 
 #include "td/telegram/DialogId.h"
-#include "td/telegram/files/FileDb.h"
 #include "td/telegram/files/FileDbId.h"
 #include "td/telegram/files/FileEncryptionKey.h"
 #include "td/telegram/files/FileGenerateManager.h"
@@ -40,6 +39,8 @@ namespace td {
 
 extern int VERBOSITY_NAME(update_file);
 
+class FileDbInterface;
+
 enum class FileLocationSource : int8 { None, FromUser, FromDb, FromServer };
 
 class FileNode {