diff --git a/pytorch3d/implicitron/dataset/json_index_dataset.py b/pytorch3d/implicitron/dataset/json_index_dataset.py
index efa6bfba..669f4e9b 100644
--- a/pytorch3d/implicitron/dataset/json_index_dataset.py
+++ b/pytorch3d/implicitron/dataset/json_index_dataset.py
@@ -894,11 +894,11 @@ class JsonIndexDataset(DatasetBase, ReplaceableBase):
         for idx in idxs:
             if (
                 subset_filter is not None
+                # pyre-fixme[16]: `JsonIndexDataset` has no attribute `frame_annots`.
                 and self.frame_annots[idx]["subset"] not in subset_filter
             ):
                 continue
 
-            # pyre-ignore[16]
             frame_annotation = self.frame_annots[idx]["frame_annotation"]
             out.append(
                 (frame_annotation.frame_number, frame_annotation.frame_timestamp)
diff --git a/pytorch3d/implicitron/dataset/single_sequence_dataset.py b/pytorch3d/implicitron/dataset/single_sequence_dataset.py
index 2ccfd376..6a0a028b 100644
--- a/pytorch3d/implicitron/dataset/single_sequence_dataset.py
+++ b/pytorch3d/implicitron/dataset/single_sequence_dataset.py
@@ -46,6 +46,8 @@ class SingleSceneDataset(DatasetBase, Configurable):
     def __len__(self) -> int:
         return len(self.poses)
 
+    # pyre-fixme[14]: `sequence_frames_in_order` overrides method defined in
+    #  `DatasetBase` inconsistently.
     def sequence_frames_in_order(
         self, seq_name: str
     ) -> Iterator[Tuple[float, int, int]]: