diff --git a/qt/aqt/editor.py b/qt/aqt/editor.py
index 5f33c78c6..437fadc66 100644
--- a/qt/aqt/editor.py
+++ b/qt/aqt/editor.py
@@ -9,6 +9,7 @@ import html
 import itertools
 import json
 import mimetypes
+import os
 import re
 import urllib.error
 import urllib.parse