diff --git a/libraries/chain/db_maint.cpp b/libraries/chain/db_maint.cpp
index c0e8a0ff..c7c978c4 100644
--- a/libraries/chain/db_maint.cpp
+++ b/libraries/chain/db_maint.cpp
@@ -1941,14 +1941,16 @@ void database::perform_son_tasks()
 
 void update_son_asset(database& db)
 {
-   if(db.head_block_time() >= HARDFORK_NEXT_TIME)
+   if( db.head_block_time() >= HARDFORK_NEXT_TIME )
    {
       const auto& gpo = db.get_global_properties();
       const asset_object& btc_asset = gpo.parameters.btc_asset()(db);
-      db.modify( btc_asset, []( asset_object& ao ) {
+      if( btc_asset.is_transfer_restricted() ) {
+         db.modify( btc_asset, []( asset_object& ao ) {
             ao.options.flags = asset_issuer_permission_flags::charge_market_fee |
                               asset_issuer_permission_flags::override_authority;
-      });
+         });
+      }
    }
 }