diff --git a/freqtrade/plugins/pairlist/MarketCapFilter.py b/freqtrade/plugins/pairlist/MarketCapFilter.py
index c2df8921c..dca8c911e 100644
--- a/freqtrade/plugins/pairlist/MarketCapFilter.py
+++ b/freqtrade/plugins/pairlist/MarketCapFilter.py
@@ -169,7 +169,7 @@ class MarketCapFilter(IPairList):
 
             # option B
             for mc_pair in marketcap_list:
-                test_pair = f"{mc_pair.upper()}/{self._stake_currency.upper}"
+                test_pair = f"{mc_pair.upper()}/{self._stake_currency.upper()}"
                 logger.info(f"Check test pair name {test_pair}")
                 if test_pair in pairlist:
                     logger.info(f"{test_pair} is in pairlist")