diff --git a/ihatemoney/utils.py b/ihatemoney/utils.py
index 696db6bf..d3dbdcb1 100644
--- a/ihatemoney/utils.py
+++ b/ihatemoney/utils.py
@@ -31,8 +31,7 @@ class CurrencyConverter(object):
     def exchange_currency(self, amount, currency1, currency2):
         if currency1 == currency2:
             return amount
-            
-        base = self.response["base"]
+
         conversion_rate1 = self.response["rates"][currency1]
         conversion_rate2 = self.response["rates"][currency2]
         new_amount = (amount / conversion_rate1) * conversion_rate2