diff --git a/freqtrade/persistence.py b/freqtrade/persistence.py
index 6c89fd737..2d497662e 100644
--- a/freqtrade/persistence.py
+++ b/freqtrade/persistence.py
@@ -82,7 +82,7 @@ def check_migrate(engine) -> None:
                 (id, exchange, pair, is_open, fee_open, fee_close, open_rate,
                 open_rate_requested, close_rate, close_rate_requested, close_profit,
                 stake_amount, amount, open_date, close_date, open_order_id)
-            select id, exchange,
+            select id, lower(exchange),
                 case
                     when instr(pair, '_') != 0 then
                     substr(pair,    instr(pair, '_') + 1) || '/' ||