diff --git a/freqtrade/strategy/strategy.py b/freqtrade/strategy/strategy.py
index 17bdb2c1f..d7a89d1de 100644
--- a/freqtrade/strategy/strategy.py
+++ b/freqtrade/strategy/strategy.py
@@ -60,7 +60,7 @@ class Strategy(object):
         # Minimal ROI designed for the strategy
         self.minimal_roi = OrderedDict(sorted(
             {int(key): value for (key, value) in self.custom_strategy.minimal_roi.items()}.items(),
-            key=lambda tuple: tuple[0]))  # sort after converting to number
+            key=lambda t: t[0]))  # sort after converting to number
 
         # Optimal stoploss designed for the strategy
         self.stoploss = float(self.custom_strategy.stoploss)