diff --git a/librustzcash-wrapper/src/lib.rs b/librustzcash-wrapper/src/lib.rs
index 1b22434..d90351e 100644
--- a/librustzcash-wrapper/src/lib.rs
+++ b/librustzcash-wrapper/src/lib.rs
@@ -1538,8 +1538,8 @@ pub extern "C" fn rust_wrapper_read_orchard_tree_anchor(
     ){
     let tree_in: Hfrontier = marshall_from_haskell_var(tree, tree_len, RW);
     let leaf = MerkleHashOrchard::from_bytes(&to_array(tree_in.leaf.bytes)).unwrap();
-    let comm_tree: NonEmptyFrontier<MerkleHashOrchard> = NonEmptyFrontier::from_parts(Position::from(tree_in.position), leaf, tree_in.ommers.iter().map(|x| MerkleHashOrchard::from_bytes(&to_array(x.bytes.clone())).unwrap() ).collect()).unwrap();
-    let root = comm_tree.root(None);
+    let comm_tree: Frontier<MerkleHashOrchard,32> = Frontier::from_parts(Position::from(tree_in.position), leaf, tree_in.ommers.iter().map(|x| MerkleHashOrchard::from_bytes(&to_array(x.bytes.clone())).unwrap() ).collect()).unwrap();
+    let root = comm_tree.root();
     let h = Hhex { bytes: root.to_bytes().to_vec() };
     marshall_to_haskell_var(&h, out, out_len, RW);
 }