From dc2bb7d81f0da8b290954ba11a27ebeb8f4a07e8 Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Tue, 6 Mar 2018 17:26:59 +0100
Subject: [PATCH] fix prev

---
 gui/qt/main_window.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gui/qt/main_window.py b/gui/qt/main_window.py
index 6ced61be3..27a4b0165 100644
--- a/gui/qt/main_window.py
+++ b/gui/qt/main_window.py
@@ -663,7 +663,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
             edit.setStyleSheet(ColorScheme.DEFAULT.as_stylesheet())
             fiat_e.is_last_edited = (edit == fiat_e)
             amount = edit.get_amount()
-            rate = self.fx.exchange_rate() if self.fx else None
+            rate = self.fx.exchange_rate() if self.fx else Decimal('NaN')
             if rate.is_nan() or amount is None:
                 if edit is fiat_e:
                     btc_e.setText("")