diff --git a/freqtrade/fiat_convert.py b/freqtrade/fiat_convert.py
index 17882f51a..3d268fdbe 100644
--- a/freqtrade/fiat_convert.py
+++ b/freqtrade/fiat_convert.py
@@ -34,7 +34,7 @@ class CryptoFiat(object):
         self.price = 0.0
 
         # Private attributes
-        self._expiration = 0
+        self._expiration = 0.0
 
         self.crypto_symbol = crypto_symbol.upper()
         self.fiat_symbol = fiat_symbol.upper()