diff --git a/src/imitation/data/serialize.py b/src/imitation/data/serialize.py
index ee9d0d3f8..fe6508cdb 100644
--- a/src/imitation/data/serialize.py
+++ b/src/imitation/data/serialize.py
@@ -20,7 +20,7 @@ def save(path: AnyPath, trajectories: Sequence[Trajectory]) -> None:
         trajectories: The trajectories to save.
     """
     p = util.parse_path(path)
-    huggingface_utils.trajectories_to_dataset(trajectories).save_to_disk(p)
+    huggingface_utils.trajectories_to_dataset(trajectories).save_to_disk(str(p))
     logging.info(f"Dumped demonstrations to {p}.")