diff --git a/numpy/__init__.pyi b/numpy/__init__.pyi
index 6a6d133e335d..e1269fb5ba17 100644
--- a/numpy/__init__.pyi
+++ b/numpy/__init__.pyi
@@ -1388,15 +1388,7 @@ _NumberType = TypeVar("_NumberType", bound=number[Any])
 if sys.version_info >= (3, 12):
     from collections.abc import Buffer as _SupportsBuffer
 else:
-    _SupportsBuffer = (
-        bytes
-        | bytearray
-        | memoryview
-        | _array.array[Any]
-        | mmap.mmap
-        | NDArray[Any]
-        | generic
-    )
+    from typing_extensions import Buffer as _SupportsBuffer
 
 _T = TypeVar("_T")
 _T_co = TypeVar("_T_co", covariant=True)
@@ -1459,8 +1451,7 @@ class ndarray(_ArrayOrScalarCommon, Generic[_ShapeType, _DType_co]):
         order: _OrderKACF = ...,
     ) -> _ArraySelf: ...
 
-    if sys.version_info >= (3, 12):
-        def __buffer__(self, flags: int, /) -> memoryview: ...
+    def __buffer__(self, flags: int, /) -> memoryview: ...
 
     def __class_getitem__(self, item: Any) -> GenericAlias: ...
 
@@ -2622,8 +2613,7 @@ class generic(_ArrayOrScalarCommon):
     @property
     def flat(self: _ScalarType) -> flatiter[NDArray[_ScalarType]]: ...
 
-    if sys.version_info >= (3, 12):
-        def __buffer__(self, flags: int, /) -> memoryview: ...
+    def __buffer__(self, flags: int, /) -> memoryview: ...
 
     @overload
     def astype(
diff --git a/numpy/_typing/_array_like.py b/numpy/_typing/_array_like.py
index 33255693806e..f599dc0eb304 100644
--- a/numpy/_typing/_array_like.py
+++ b/numpy/_typing/_array_like.py
@@ -80,16 +80,13 @@ def __array_function__(
 
 if sys.version_info >= (3, 12):
     from collections.abc import Buffer
-
-    ArrayLike = Buffer | _DualArrayLike[
-        dtype[Any],
-        Union[bool, int, float, complex, str, bytes],
-    ]
 else:
-    ArrayLike = _DualArrayLike[
-        dtype[Any],
-        Union[bool, int, float, complex, str, bytes],
-    ]
+    from typing_extensions import Buffer
+
+ArrayLike = Buffer | _DualArrayLike[
+    dtype[Any],
+    Union[bool, int, float, complex, str, bytes],
+]
 
 # `ArrayLike<X>_co`: array-like objects that can be coerced into `X`
 # given the casting rules `same_kind`
diff --git a/numpy/typing/tests/data/reveal/array_constructors.pyi b/numpy/typing/tests/data/reveal/array_constructors.pyi
index 814da1b9d639..e3dc6b25ccdb 100644
--- a/numpy/typing/tests/data/reveal/array_constructors.pyi
+++ b/numpy/typing/tests/data/reveal/array_constructors.pyi
@@ -214,10 +214,9 @@ assert_type(np.stack([A, A], out=B), SubClass[np.float64])
 assert_type(np.block([[A, A], [A, A]]), npt.NDArray[Any])
 assert_type(np.block(C), npt.NDArray[Any])
 
-if sys.version_info >= (3, 12):
-    from collections.abc import Buffer
+from typing_extensions import Buffer
 
-    def create_array(obj: npt.ArrayLike) -> npt.NDArray[Any]: ...
+def create_array(obj: npt.ArrayLike) -> npt.NDArray[Any]: ...
 
-    buffer: Buffer
-    assert_type(create_array(buffer), npt.NDArray[Any])
+buffer: Buffer
+assert_type(create_array(buffer), npt.NDArray[Any])