diff --git a/libraries/chain/db_maint.cpp b/libraries/chain/db_maint.cpp
index 632415ce..d6f830ea 100644
--- a/libraries/chain/db_maint.cpp
+++ b/libraries/chain/db_maint.cpp
@@ -804,7 +804,7 @@ void database::update_active_sons()
 
 
    // Compare current and to-be lists of active sons
-   const auto& cur_active_sons = gpo.active_sons;
+   const auto cur_active_sons = gpo.active_sons;
    flat_map<sidechain_type, vector<son_info> > new_active_sons;
    const auto &acc = get(gpo.parameters.son_account());
    for( const auto& sidechain_sons : sons ){