diff --git a/src/hdmf/backends/hdf5/h5tools.py b/src/hdmf/backends/hdf5/h5tools.py
index b01ab2658..05ce36e13 100644
--- a/src/hdmf/backends/hdf5/h5tools.py
+++ b/src/hdmf/backends/hdf5/h5tools.py
@@ -17,7 +17,6 @@
 from ...build import (Builder, GroupBuilder, DatasetBuilder, LinkBuilder, BuildManager, RegionBuilder,
                       ReferenceBuilder, TypeMap, ObjectMapper)
 from ...container import Container
-from ...term_set import TermSetWrapper
 from ...data_utils import AbstractDataChunkIterator
 from ...spec import RefSpec, DtypeSpec, NamespaceCatalog
 from ...utils import docval, getargs, popargs, get_data_shape, get_docval, StrDataset