diff --git a/freqtrade/rpc/rpc.py b/freqtrade/rpc/rpc.py
index 147861dca..f9939c604 100644
--- a/freqtrade/rpc/rpc.py
+++ b/freqtrade/rpc/rpc.py
@@ -796,7 +796,7 @@ class RPC:
         results.loc[:, "__date_ts"] = results.loc[:, "date"].astype("int64") // 1000 // 1000
 
         results = results.groupby(["date", "__date_ts"]).agg({"total": "sum"}).reset_index()
-        hist = KeyValueStore.get_datetime_value("wallet_history_migration_date", None)
+        hist = KeyValueStore.get_datetime_value("wallet_history_migration_date")
         return results, dt_ts_def(hist, 0)
 
     def __balance_get_est_stake(