diff --git a/src/peakrdl_python/lib/async_register_and_field.py b/src/peakrdl_python/lib/async_register_and_field.py
index 794571b..be6fe58 100644
--- a/src/peakrdl_python/lib/async_register_and_field.py
+++ b/src/peakrdl_python/lib/async_register_and_field.py
@@ -20,7 +20,7 @@
 asynchronous registers and fields
 """
 from enum import Enum
-from typing import List, Union, Iterator, Tuple, Optional, Dict, TypeVar, cast, TypeGuard
+from typing import List, Union, Iterator, Tuple, Optional, Dict, TypeVar, cast
 from typing import AsyncGenerator
 from abc import ABC, abstractmethod
 from contextlib import asynccontextmanager
@@ -47,6 +47,14 @@
     from typing_extensions import Self
 # pylint: enable=duplicate-code
 
+# pylint: disable=duplicate-code
+if sys.version_info >= (3, 10):
+    # type guarding was introduced in python 3.10
+    from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard
+# pylint: enable=duplicate-code
+
 # pylint: disable=redefined-slots-in-subclass,too-many-lines
 
 
diff --git a/src/peakrdl_python/lib/register_and_field.py b/src/peakrdl_python/lib/register_and_field.py
index eb68cbb..1a092b9 100644
--- a/src/peakrdl_python/lib/register_and_field.py
+++ b/src/peakrdl_python/lib/register_and_field.py
@@ -20,7 +20,7 @@
 registers and fields
 """
 from enum import Enum
-from typing import List, Union, Iterator, Tuple, cast, Optional, Dict, TypeVar, TypeGuard
+from typing import List, Union, Iterator, Tuple, cast, Optional, Dict, TypeVar
 from typing import Generator
 from abc import ABC, abstractmethod
 from contextlib import contextmanager
@@ -47,6 +47,14 @@
     from typing_extensions import Self
 # pylint: enable=duplicate-code
 
+# pylint: disable=duplicate-code
+if sys.version_info >= (3, 10):
+    # type guarding was introduced in python 3.10
+    from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard
+# pylint: enable=duplicate-code
+
 # pylint: disable=redefined-slots-in-subclass,too-many-lines