diff --git a/svn_mirror/svn.py b/svn_mirror/svn.py
index 91356b9..9a14c61 100644
--- a/svn_mirror/svn.py
+++ b/svn_mirror/svn.py
@@ -1,5 +1,6 @@
 """SVN repository remote interface (via svn CLI)."""
 
+import os
 import subprocess
 import xml.etree.ElementTree as ET
 from dataclasses import dataclass, field