diff --git a/src/ifcopenshell-python/ifcopenshell/util/doc.py b/src/ifcopenshell-python/ifcopenshell/util/doc.py
index 029f797e19..41d6189fe4 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/doc.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/doc.py
@@ -23,7 +23,8 @@ import ifcopenshell
 import ifcopenshell.ifcopenshell_wrapper as ifcopenshell_wrapper
 import ifcopenshell.util.attribute
 import ifcopenshell.util.schema
-from typing import Optional, Literal, Any, Union, TypedDict, NotRequired
+from typing import Optional, Literal, Any, Union, TypedDict
+from typing_extensions import NotRequired
 
 try:
     import glob