diff --git a/extern/rust-fil-proofs/filecoin-proofs/src/api/window_post.rs b/extern/rust-fil-proofs/filecoin-proofs/src/api/window_post.rs
index 06e7a1dae37a2e168e555cf47cd7a1eeb0c31bcf..0f517f7d5ad32f16650a8adf68de923edbbc84a0 100644
--- a/extern/rust-fil-proofs/filecoin-proofs/src/api/window_post.rs
+++ b/extern/rust-fil-proofs/filecoin-proofs/src/api/window_post.rs
@@ -270,7 +270,7 @@ pub fn aggregate_window_post_proofs<Tree: 'static + MerkleTreeTrait>(
             .try_fold(Vec::new(), |mut acc, commit_output| -> Result<_> {
                 acc.extend(
                     MultiProof::new_from_reader(
-                        Some(partitions),
+                        partitions,
                         &commit_output[..],
                         &verifying_key,
                     )?