diff --git a/framework/base/src/storage/mappers.rs b/framework/base/src/storage/mappers.rs
index a34a175352..5b39315922 100644
--- a/framework/base/src/storage/mappers.rs
+++ b/framework/base/src/storage/mappers.rs
@@ -14,7 +14,7 @@ mod user_mapper;
 mod vec_mapper;
 mod whitelist_mapper;
 
-pub use address_to_id_mapper::{AddressId, AddressToIdMapper};
+pub use address_to_id_mapper::{AddressToIdMapper, AddressId, NULL_ID};
 pub use bi_di_mapper::BiDiMapper;
 pub use linked_list_mapper::{LinkedListMapper, LinkedListNode};
 pub use map_mapper::MapMapper;