diff --git a/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp b/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp
index 1f0e8d76..3fb4720f 100644
--- a/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp
@@ -41,7 +41,6 @@ namespace graphene { namespace chain {
       uint32_t                committee_proposal_review_period    = GRAPHENE_DEFAULT_COMMITTEE_PROPOSAL_REVIEW_PERIOD_SEC; ///< minimum time in seconds that a proposed transaction requiring committee authority may not be signed, prior to expiration
       uint32_t                maximum_transaction_size            = GRAPHENE_DEFAULT_MAX_TRANSACTION_SIZE; ///< maximum allowable size in bytes for a transaction
       uint32_t                maximum_block_size                  = GRAPHENE_DEFAULT_MAX_BLOCK_SIZE; ///< maximum allowable size in bytes for a block
-      uint32_t                maximum_expiration                  = 0; ///< ignored, but included to ensure we don't hardfork; see #308
       uint32_t                maximum_time_until_expiration       = GRAPHENE_DEFAULT_MAX_TIME_UNTIL_EXPIRATION; ///< maximum lifetime in seconds for transactions to be valid, before expiring
       uint32_t                maximum_proposal_lifetime           = GRAPHENE_DEFAULT_MAX_PROPOSAL_LIFETIME_SEC; ///< maximum lifetime in seconds for proposed transactions to be kept, before expiring
       uint8_t                 maximum_asset_whitelist_authorities = GRAPHENE_DEFAULT_MAX_ASSET_WHITELIST_AUTHORITIES; ///< maximum number of accounts which an asset may list as authorities for its whitelist OR blacklist
@@ -80,7 +79,6 @@ FC_REFLECT( graphene::chain::chain_parameters,
             (committee_proposal_review_period)
             (maximum_transaction_size)
             (maximum_block_size)
-            (maximum_expiration)
             (maximum_time_until_expiration)
             (maximum_proposal_lifetime)
             (maximum_asset_whitelist_authorities)