diff --git a/beacon_chain/utils/ssz/src/decode.rs b/beacon_chain/utils/ssz/src/decode.rs
index 7f92c8dd74..0ab02b4585 100644
--- a/beacon_chain/utils/ssz/src/decode.rs
+++ b/beacon_chain/utils/ssz/src/decode.rs
@@ -4,6 +4,7 @@ use super::LENGTH_BYTES;
 pub enum DecodeError {
     TooShort,
     TooLong,
+    Invalid,
 }
 
 pub trait Decodable: Sized {