diff --git a/src/whisk.rs b/src/whisk.rs
index aef05c5..eed1b04 100644
--- a/src/whisk.rs
+++ b/src/whisk.rs
@@ -308,12 +308,10 @@ pub fn rand_scalar<T: RngCore>(rng: &mut T) -> Fr {
 }
 
 /// Serialize field element to bytes
-pub fn to_bytes_fr(fr: &Fr) -> FieldElementBytes {
-    let mut bytes = [0u8; FIELD_ELEMENT_SIZE];
-
-    fr.serialize_uncompressed(&mut bytes[..]).unwrap();
-
-    bytes
+pub fn to_bytes_fr(fr: &Fr) -> Result<FieldElementBytes, SerializationError> {
+    let mut out = [0u8; FIELD_ELEMENT_SIZE];
+    fr.serialize_uncompressed(&mut out[..])?;
+    Ok(out)
 }
 
 /// Convert bytes to a BLS field scalar. The output is not uniform over the BLS field.
@@ -339,7 +337,7 @@ mod tests {
             hex::decode("9ebde6d84a58debe5ef02c729366a76078a15a653aa6234aeab6996ce47f8d2a")
                 .unwrap();
         let k = from_bytes_fr(&k_bytes);
-        assert_eq!(to_bytes_fr(&k).as_slice(), &k_bytes);
+        assert_eq!(to_bytes_fr(&k).unwrap().as_slice(), &k_bytes);
     }
 
     #[test]