diff --git a/librustzcash-wrapper/src/lib.rs b/librustzcash-wrapper/src/lib.rs
index 744a911..e5879ef 100644
--- a/librustzcash-wrapper/src/lib.rs
+++ b/librustzcash-wrapper/src/lib.rs
@@ -457,14 +457,16 @@ pub extern "C" fn rust_wrapper_tx_parse(
                     marshall_to_haskell_var(&s_output, out, out_len, RW);
                 },
                 None => {
-                    let z = HrawTx { bytes: vec![0], s: false, o: false};
+                    let mut z = Vec::new();
+                    z.push(vec![0]);
                     marshall_to_haskell_var(&z, out, out_len, RW);
                 }
             }
 
         },
         Err(_e) => {
-            let y = HrawTx { bytes: vec![0], s: false, o: false};
+            let mut y = Vec::new();
+            y.push(vec![0]);
             marshall_to_haskell_var(&y, out, out_len, RW);
         }
     }