diff --git a/dataclass_array/array_dataclass.py b/dataclass_array/array_dataclass.py
index 215cd96..23910b8 100644
--- a/dataclass_array/array_dataclass.py
+++ b/dataclass_array/array_dataclass.py
@@ -46,7 +46,7 @@
 _DcT = TypeVar('_DcT', bound='DataclassArray')
 
 # Any valid numpy indices slice ([x], [x:y], [:,...], ...)
-_IndiceItem = Union[type(Ellipsis), None, int, slice, Any]
+_IndiceItem = Union[type(Ellipsis), None, int, slice, Any]  # pyrefly: ignore[invalid-annotation]
 _Indices = Tuple[_IndiceItem]  # Normalized slicing
 _IndicesArg = Union[_IndiceItem, _Indices]