diff --git a/librustzcash-wrapper/src/lib.rs b/librustzcash-wrapper/src/lib.rs
index d90351e..93b96ee 100644
--- a/librustzcash-wrapper/src/lib.rs
+++ b/librustzcash-wrapper/src/lib.rs
@@ -1514,7 +1514,13 @@ pub extern "C" fn rust_wrapper_read_orchard_frontier(
                 Some(f2) => {
                     let (pos, leaf, omm) = f2.clone().into_parts();
                     let f = Hfrontier { position: <u64>::from(pos), leaf: Hhex { bytes: leaf.to_bytes().to_vec()}, ommers: omm.iter().map(|&x| Hhex { bytes: x.to_bytes().to_vec()}).collect()};
-                    marshall_to_haskell_var(&f, out, out_len, RW);
+                    let comm_tree2: Frontier<MerkleHashOrchard,32> = Frontier::from_parts(Position::from(f.position), MerkleHashOrchard::from_bytes(&to_array(f.leaf.bytes.clone())).unwrap(), f.ommers.iter().map(|x| MerkleHashOrchard::from_bytes(&to_array(x.bytes.clone())).unwrap() ).collect()).unwrap();
+                    if f1.root() == comm_tree2.root() {
+                        marshall_to_haskell_var(&f, out, out_len, RW);
+                    } else {
+                        let f0 = Hfrontier { position: 0, leaf: Hhex { bytes: vec![0]}, ommers: vec![Hhex { bytes: vec![0]}]};
+                        marshall_to_haskell_var(&f0, out, out_len, RW);
+                    }
                 },
                 None => {
                     let f0 = Hfrontier { position: 0, leaf: Hhex { bytes: vec![0]}, ommers: vec![Hhex { bytes: vec![0]}]};