diff --git a/plugins/chain_plugin/include/eosio/chain_plugin/chain_plugin.hpp b/plugins/chain_plugin/include/eosio/chain_plugin/chain_plugin.hpp
index 8ab6517ae8..82fd082e48 100644
--- a/plugins/chain_plugin/include/eosio/chain_plugin/chain_plugin.hpp
+++ b/plugins/chain_plugin/include/eosio/chain_plugin/chain_plugin.hpp
@@ -587,7 +587,7 @@ class read_only : public api_base {
       const auto* t_id = d.find<chain::table_id_object, chain::by_code_scope_table>(boost::make_tuple(p.code, scope, p.table));
       const auto* index_t_id = d.find<chain::table_id_object, chain::by_code_scope_table>(boost::make_tuple(p.code, scope, name(table_with_index)));
       if( t_id != nullptr && index_t_id != nullptr ) {
-         using secondary_key_type = std::result_of_t<decltype(conv)(SecKeyType)>;
+         using secondary_key_type = std::invoke_result_t<decltype(conv), SecKeyType>;
          static_assert( std::is_same<typename IndexType::value_type::secondary_key_type, secondary_key_type>::value, "Return type of conv does not match type of secondary key for IndexType" );
 
          const auto& secidx = d.get_index<IndexType, chain::by_secondary>();