diff --git a/fdbclient/BackupContainerLocalDirectory.actor.cpp b/fdbclient/BackupContainerLocalDirectory.actor.cpp
index 4eba9bf72f..9b2a976376 100644
--- a/fdbclient/BackupContainerLocalDirectory.actor.cpp
+++ b/fdbclient/BackupContainerLocalDirectory.actor.cpp
@@ -22,7 +22,8 @@
 
 #include "flow/actorcompiler.h" // This must be the last #include.
 
-// TODO: Put in namespace
+namespace {
+
 class BackupFile : public IBackupFile, ReferenceCounted<BackupFile> {
 public:
 	BackupFile(std::string fileName, Reference<IAsyncFile> file, std::string finalFullPath)
@@ -77,6 +78,8 @@ ACTOR static Future<BackupContainerFileSystem::FilesAndSizesT> listFiles_impl(st
 	return results;
 }
 
+} // namespace
+
 void BackupContainerLocalDirectory::addref() {
 	return ReferenceCounted<BackupContainerLocalDirectory>::addref();
 }