diff --git a/apps/files_external/lib/smb.php b/apps/files_external/lib/smb.php
index 7ebeb1565b4..4a2eebf20b1 100644
--- a/apps/files_external/lib/smb.php
+++ b/apps/files_external/lib/smb.php
@@ -33,6 +33,7 @@ use Icewind\SMB\Exception\Exception;
 use Icewind\SMB\Exception\NotFoundException;
 use Icewind\SMB\NativeServer;
 use Icewind\SMB\Server;
+use Icewind\Streams\CallbackWrapper;
 use Icewind\Streams\IteratorDirectory;
 use OC\Files\Filesystem;