diff --git a/libraries/chain/include/graphene/chain/protocol/witness.hpp b/libraries/chain/include/graphene/chain/protocol/witness.hpp
index 2ab4c926..27e40d60 100644
--- a/libraries/chain/include/graphene/chain/protocol/witness.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/witness.hpp
@@ -83,4 +83,4 @@ FC_REFLECT( graphene::chain::witness_create_operation::fee_parameters_type, (fee
 FC_REFLECT( graphene::chain::witness_create_operation, (fee)(witness_account)(url)(block_signing_key)(initial_secret) )
 
 FC_REFLECT( graphene::chain::witness_update_operation::fee_parameters_type, (fee) )
-FC_REFLECT( graphene::chain::witness_update_operation, (fee)(witness)(witness_account)(new_url)(new_signing_key) )
+FC_REFLECT( graphene::chain::witness_update_operation, (fee)(witness)(witness_account)(new_url)(new_signing_key)(new_initial_secret) )