diff --git a/libraries/state_history/include/eosio/state_history/serialization.hpp b/libraries/state_history/include/eosio/state_history/serialization.hpp
index f2e41814f97..280d5c44543 100644
--- a/libraries/state_history/include/eosio/state_history/serialization.hpp
+++ b/libraries/state_history/include/eosio/state_history/serialization.hpp
@@ -91,30 +91,6 @@ ST& operator<<(ST& ds, const eosio::state_history::big_vector_wrapper<T>& obj) {
    return ds;
 }
 
-template <typename ST>
-inline void history_pack_varuint64(ST& ds, uint64_t val) {
-   do {
-      uint8_t b = uint8_t(val) & 0x7f;
-      val >>= 7;
-      b |= ((val > 0) << 7);
-      ds.write((char*)&b, 1);
-   } while (val);
-}
-
-template <typename ST>
-void history_pack_big_bytes(ST& ds, const eosio::chain::bytes& v) {
-   history_pack_varuint64(ds, v.size());
-   if (v.size())
-      ds.write(&v.front(), (uint32_t)v.size());
-}
-
-template <typename ST>
-void history_pack_big_bytes(ST& ds, const std::optional<eosio::chain::bytes>& v) {
-   fc::raw::pack(ds, v.has_value());
-   if (v)
-      history_pack_big_bytes(ds, *v);
-}
-
 template <typename ST, typename T>
 ST& operator<<(ST& ds, const history_serial_wrapper<std::vector<T>>& obj) {
    return history_serialize_container(ds, obj.db, obj.obj);
@@ -738,9 +714,9 @@ ST& operator<<(ST& ds, const eosio::state_history::get_blocks_result_v0& obj) {
    fc::raw::pack(ds, obj.last_irreversible);
    fc::raw::pack(ds, obj.this_block);
    fc::raw::pack(ds, obj.prev_block);
-   history_pack_big_bytes(ds, obj.block);
-   history_pack_big_bytes(ds, obj.traces);
-   history_pack_big_bytes(ds, obj.deltas);
+   eosio::state_history::pack_big_bytes(ds, obj.block);
+   eosio::state_history::pack_big_bytes(ds, obj.traces);
+   eosio::state_history::pack_big_bytes(ds, obj.deltas);
    return ds;
 }
 
diff --git a/libraries/state_history/include/eosio/state_history/types.hpp b/libraries/state_history/include/eosio/state_history/types.hpp
index 7ca88ac3be7..3a15d856036 100644
--- a/libraries/state_history/include/eosio/state_history/types.hpp
+++ b/libraries/state_history/include/eosio/state_history/types.hpp
@@ -20,6 +20,30 @@ struct big_vector_wrapper {
    T obj;
 };
 
+template <typename ST>
+inline void pack_varuint64(ST& ds, uint64_t val) {
+   do {
+      uint8_t b = uint8_t(val) & 0x7f;
+      val >>= 7;
+      b |= ((val > 0) << 7);
+      ds.write((char*)&b, 1);
+   } while (val);
+}
+
+template <typename ST>
+void pack_big_bytes(ST& ds, const eosio::chain::bytes& v) {
+   pack_varuint64(ds, v.size());
+   if (v.size())
+      ds.write(&v.front(), v.size());
+}
+
+template <typename ST>
+void pack_big_bytes(ST& ds, const std::optional<eosio::chain::bytes>& v) {
+   fc::raw::pack(ds, v.has_value());
+   if (v)
+      pack_big_bytes(ds, *v);
+}
+
 template <typename T>
 class opaque {
    std::vector<char> data;
@@ -41,7 +65,9 @@ class opaque {
 
    template <typename ST>
    void pack_to(ST& ds) const {
-      fc::raw::pack(ds, this->data);
+      // we need to pack as big vector because it can be used to hold the state delta object
+      // which would be as large as the eos snapshot when the nodeos restarted from a snapshot.
+      pack_big_bytes(ds, this->data);
    }
 };