diff --git a/kitty/tab_bar.py b/kitty/tab_bar.py
index 8e3b494c4..a6363f7f8 100644
--- a/kitty/tab_bar.py
+++ b/kitty/tab_bar.py
@@ -223,7 +223,7 @@ class TabAccessor:
 
 
 safe_builtins = {
-    'max': max, 'min': min, 'str': str, 'repr': repr, 'abs': abs, 'len': len, 're': re,
+    'max': max, 'min': min, 'str': str, 'repr': repr, 'abs': abs, 'len': len, 'chr': chr, 'ord': ord, 're': re,
 }