diff --git a/libraries/chain/include/graphene/chain/son_wallet_object.hpp b/libraries/chain/include/graphene/chain/son_wallet_object.hpp
index 315def33..578dee61 100644
--- a/libraries/chain/include/graphene/chain/son_wallet_object.hpp
+++ b/libraries/chain/include/graphene/chain/son_wallet_object.hpp
@@ -34,9 +34,6 @@ namespace graphene { namespace chain {
          >,
          ordered_unique< tag<by_valid_from>,
             member<son_wallet_object, time_point_sec, &son_wallet_object::valid_from>
-         >,
-         ordered_unique< tag<by_expires>,
-            member<son_wallet_object, time_point_sec, &son_wallet_object::expires>
          >
       >
    >;