diff --git a/beacon_node/beacon_chain/src/beacon_chain.rs b/beacon_node/beacon_chain/src/beacon_chain.rs
index 02c1d2e97f..a58fc63e7a 100644
--- a/beacon_node/beacon_chain/src/beacon_chain.rs
+++ b/beacon_node/beacon_chain/src/beacon_chain.rs
@@ -630,6 +630,7 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
         PersistedBeaconChain {
             _canonical_head_block_root: DUMMY_CANONICAL_HEAD_BLOCK_ROOT,
             genesis_block_root,
+            ssz_head_tracker: <_>::default(),
         }
     }
 
diff --git a/beacon_node/beacon_chain/src/persisted_beacon_chain.rs b/beacon_node/beacon_chain/src/persisted_beacon_chain.rs
index 0a85c2cdfb..d834bd1af6 100644
--- a/beacon_node/beacon_chain/src/persisted_beacon_chain.rs
+++ b/beacon_node/beacon_chain/src/persisted_beacon_chain.rs
@@ -1,7 +1,7 @@
 use ssz::{Decode, Encode};
 use ssz_derive::{Decode, Encode};
 use store::{DBColumn, Error as StoreError, StoreItem};
-use types::Hash256;
+use types::{Hash256, Slot};
 
 /// Dummy value to use for the canonical head block root, see below.
 pub const DUMMY_CANONICAL_HEAD_BLOCK_ROOT: Hash256 = Hash256::repeat_byte(0xff);
@@ -17,6 +17,15 @@ pub struct PersistedBeaconChain {
     /// https://github.com/sigp/lighthouse/issues/1784
     pub _canonical_head_block_root: Hash256,
     pub genesis_block_root: Hash256,
+    /// DEPRECATED
+    pub ssz_head_tracker: SszHeadTracker,
+}
+
+/// DEPRECATED
+#[derive(Encode, Decode, Clone, Default)]
+pub struct SszHeadTracker {
+    roots: Vec<Hash256>,
+    slots: Vec<Slot>,
 }
 
 impl StoreItem for PersistedBeaconChain {