diff --git a/lighthouse/state/attestation_record.rs b/lighthouse/state/attestation_record.rs
index e8725cfd7..46f2f9ff4 100644
--- a/lighthouse/state/attestation_record.rs
+++ b/lighthouse/state/attestation_record.rs
@@ -1,5 +1,6 @@
 use super::utils::types::{ Hash256, Bitfield };
 use super::utils::bls::{ AggregateSignature };
+use super::ssz::{ Encodable, SszStream };
 
 
 pub struct AttestationRecord {
@@ -11,6 +12,17 @@ pub struct AttestationRecord {
     pub aggregate_sig: Option<AggregateSignature>,
 }
 
+impl Encodable for AttestationRecord {
+    fn ssz_append(&self, s: &mut SszStream) {
+        s.append(&self.slot);
+        s.append(&self.shard_id);
+        s.append_vec(&self.oblique_parent_hashes);
+        s.append(&self.shard_block_hash);
+        s.append(&self.attester_bitfield);
+        // TODO: add aggregate signature
+    }
+}
+
 impl AttestationRecord {
     pub fn zero() -> Self {
         Self {