diff --git a/freqtrade/data/history/datahandlers/idatahandler.py b/freqtrade/data/history/datahandlers/idatahandler.py
index fbaded640..cff26760f 100644
--- a/freqtrade/data/history/datahandlers/idatahandler.py
+++ b/freqtrade/data/history/datahandlers/idatahandler.py
@@ -302,8 +302,8 @@ class IDataHandler(ABC):
         Rebuild pair name from filename
         Assumes a asset name of max. 7 length to also support BTC-PERP and BTC-PERP:USD names.
         """
-        res = re.sub(r'^(([A-Za-z\d]{1,10})|^([A-Za-z\-]{1,6}))(_)', r'\g<1>/', pair, 1)
-        res = re.sub('_', ':', res, 1)
+        res = re.sub(r'^(([A-Za-z\d]{1,10})|^([A-Za-z\-]{1,6}))(_)', r'\g<1>/', pair, count=1)
+        res = re.sub('_', ':', res, count=1)
         return res
 
     def ohlcv_load(self, pair, timeframe: str,