diff --git a/src/pynwb/__init__.py b/src/pynwb/__init__.py
index 4cc99267d..5fde252b1 100644
--- a/src/pynwb/__init__.py
+++ b/src/pynwb/__init__.py
@@ -273,6 +273,8 @@ def export(self, **kwargs):
 from . import ophys  # noqa: F401,E402
 from . import retinotopy  # noqa: F401,E402
 from . import legacy  # noqa: F401,E402
+from hdmf.data_utils import DataChunkIterator  # noqa: F401,E402
+from hdmf.backends.hdf5 import H5DataIO  # noqa: F401,E402
 
 from ._version import get_versions  # noqa: E402
 __version__ = get_versions()['version']