diff --git a/beacon_chain/types/src/beacon_block.rs b/beacon_chain/types/src/beacon_block.rs
index b6ac9e9e0..df8f939e3 100644
--- a/beacon_chain/types/src/beacon_block.rs
+++ b/beacon_chain/types/src/beacon_block.rs
@@ -4,7 +4,7 @@ use crate::test_utils::TestRandom;
 use bls::AggregateSignature;
 use rand::RngCore;
 
-#[derive(Debug, PartialEq, Clone, Default)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct BeaconBlock {
     pub slot: u64,
     pub parent_root: Hash256,
diff --git a/beacon_chain/types/src/casper_slashing.rs b/beacon_chain/types/src/casper_slashing.rs
index a972f2248..f3c1b5d18 100644
--- a/beacon_chain/types/src/casper_slashing.rs
+++ b/beacon_chain/types/src/casper_slashing.rs
@@ -3,7 +3,7 @@ use super::SlashableVoteData;
 use crate::test_utils::TestRandom;
 use rand::RngCore;
 
-#[derive(Debug, PartialEq, Clone, Default)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct CasperSlashing {
     pub slashable_vote_data_1: SlashableVoteData,
     pub slashable_vote_data_2: SlashableVoteData,
diff --git a/beacon_chain/types/src/proposer_slashing.rs b/beacon_chain/types/src/proposer_slashing.rs
index d2d353112..0ae1c6e66 100644
--- a/beacon_chain/types/src/proposer_slashing.rs
+++ b/beacon_chain/types/src/proposer_slashing.rs
@@ -4,7 +4,7 @@ use crate::test_utils::TestRandom;
 use bls::Signature;
 use rand::RngCore;
 
-#[derive(Debug, PartialEq, Clone, Default)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct ProposerSlashing {
     pub proposer_index: u32,
     pub proposal_data_1: ProposalSignedData,
diff --git a/beacon_chain/types/src/slashable_vote_data.rs b/beacon_chain/types/src/slashable_vote_data.rs
index 9eb3d1984..4d8e2eab3 100644
--- a/beacon_chain/types/src/slashable_vote_data.rs
+++ b/beacon_chain/types/src/slashable_vote_data.rs
@@ -4,7 +4,7 @@ use crate::test_utils::TestRandom;
 use bls::AggregateSignature;
 use rand::RngCore;
 
-#[derive(Debug, PartialEq, Clone, Default)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct SlashableVoteData {
     pub aggregate_signature_poc_0_indices: Vec<u32>,
     pub aggregate_signature_poc_1_indices: Vec<u32>,