diff --git a/libs/core/langchain_core/messages/content_blocks.py b/libs/core/langchain_core/messages/content_blocks.py
index 16a42b36d1e..94342bea357 100644
--- a/libs/core/langchain_core/messages/content_blocks.py
+++ b/libs/core/langchain_core/messages/content_blocks.py
@@ -103,9 +103,14 @@ The module defines several types of content blocks, including:
 """  # noqa: E501
 
 import warnings
-from typing import Any, Literal, Optional, TypeGuard, Union
+from typing import Any, Literal, Optional, Union
 from uuid import uuid4
 
+try:
+    from typing import TypeGuard
+except ImportError:
+    from typing_extensions import TypeGuard
+
 from typing_extensions import NotRequired, TypedDict, get_args, get_origin