diff --git a/freqtrade/exchange/bittrex.py b/freqtrade/exchange/bittrex.py
index c0048b07d..ec48a046b 100644
--- a/freqtrade/exchange/bittrex.py
+++ b/freqtrade/exchange/bittrex.py
@@ -94,7 +94,7 @@ class Bittrex(Exchange):
         data = _API.get_balances()
         if not data['success']:
             Bittrex._validate_response(data)
-            raise OperationalException('{message}'.format(message=data['message'])
+            raise OperationalException('{message}'.format(message=data['message']))
         return data['result']