diff --git a/freqtrade/data/history/idatahandler.py b/freqtrade/data/history/idatahandler.py
index eb5ad3621..c2d92fc4f 100644
--- a/freqtrade/data/history/idatahandler.py
+++ b/freqtrade/data/history/idatahandler.py
@@ -272,7 +272,7 @@ class IDataHandler(ABC):
         return res
 
     def ohlcv_load(self, pair, timeframe: str,
-                   candle_type: CandleType,
+                   candle_type: CandleType, *,
                    timerange: Optional[TimeRange] = None,
                    fill_missing: bool = True,
                    drop_incomplete: bool = True,