diff --git a/kitty/tab_bar.py b/kitty/tab_bar.py
index c1fbd62ab..290155dc1 100644
--- a/kitty/tab_bar.py
+++ b/kitty/tab_bar.py
@@ -14,7 +14,6 @@ from typing import (
     Optional,
     Sequence,
     Tuple,
-    Union,
 )
 
 from .borders import Border, BorderColor