diff --git a/freqtrade/optimize/backtesting.py b/freqtrade/optimize/backtesting.py
index 4b0288881..064a2f6ba 100644
--- a/freqtrade/optimize/backtesting.py
+++ b/freqtrade/optimize/backtesting.py
@@ -272,7 +272,7 @@ class Backtesting:
         elif sell.sell_type == (SellType.ROI):
             roi_entry, roi = self.strategy.min_roi_reached_entry(trade_dur)
             if roi is not None:
-                if roi == -1 and roi_entry % self.timeframe_mins == 0:
+                if roi == -1 and roi_entry % self.timeframe_min == 0:
                     # When forceselling with ROI=-1, the roi time will always be equal to trade_dur.
                     # If that entry is a multiple of the timeframe (so on candle open)
                     # - we'll use open instead of close
@@ -283,7 +283,7 @@ class Backtesting:
                                 (1 + trade.fee_open)) / (trade.fee_close - 1)
 
                 if (trade_dur > 0 and trade_dur == roi_entry
-                        and roi_entry % self.timeframe_mins == 0
+                        and roi_entry % self.timeframe_min == 0
                         and sell_row.open > close_rate):
                     # new ROI entry came into effect.
                     # use Open rate if open_rate > calculated sell rate