diff --git a/libraries/chain/include/eosio/chain/block.hpp b/libraries/chain/include/eosio/chain/block.hpp
index b49651b4183..97cb5af8b00 100644
--- a/libraries/chain/include/eosio/chain/block.hpp
+++ b/libraries/chain/include/eosio/chain/block.hpp
@@ -140,7 +140,7 @@ namespace eosio { namespace chain {
    };
 
    struct block_trace {
-      block_trace(const signed_block& s)
+      explicit block_trace(const signed_block& s)
       :block(s)
       {}
 
diff --git a/plugins/account_history_plugin/account_history_plugin.cpp b/plugins/account_history_plugin/account_history_plugin.cpp
index b4c2ef3634a..55fdbf5989d 100644
--- a/plugins/account_history_plugin/account_history_plugin.cpp
+++ b/plugins/account_history_plugin/account_history_plugin.cpp
@@ -467,7 +467,7 @@ void account_history_plugin::plugin_startup()
    db.add_index<transaction_history_multi_index>();
 
    my->chain_plug->chain().applied_block.connect ([&impl = my](const chain::block_trace& trace) {
-      impl->applied_block(trace.block);
+      impl->applied_block(trace);
    });
 }