diff --git a/freqtrade/freqtradebot.py b/freqtrade/freqtradebot.py
index 6efe08a5d..c6a2d667f 100644
--- a/freqtrade/freqtradebot.py
+++ b/freqtrade/freqtradebot.py
@@ -635,6 +635,7 @@ class FreqtradeBot(LoggingMixin):
                 buy_tag=buy_tag,
                 timeframe=timeframe_to_minutes(self.config['timeframe'])
             )
+        trade.fee_open_currency = None
         trade.orders.append(order_obj)
         trade.recalc_trade_from_orders()
         Trade.query.session.add(trade)