diff --git a/backupbot.py b/backupbot.py
index 06d006c..6aae2b1 100755
--- a/backupbot.py
+++ b/backupbot.py
@@ -100,7 +100,7 @@ def get_backup_cmds():
                     path_ = Path(VOLUME_PATH) / f"{stack_name}_{mount['Source']}"
                 logging.debug(
                     f"Added backup path {path_}")
-                backup_paths = backup_paths.add(path_)
+                backup_paths.add(path_)
             if not (container := container_by_service.get(s.name)):
                 logging.error(
                     f"Container {s.name} is not running, hooks can not be executed")