fix #3068

8 years ago · 0497561e56
1 changed files with 1 additions and 1 deletions
--- a/gui/qt/fee_slider.py
+++ b/gui/qt/fee_slider.py
@ -36,7 +36,7 @@ class FeeSlider(QSlider):

    def get_tooltip(self, pos, fee_rate):
        from electrum.util import fee_levels
-        rate_str = self.window.format_fee_rate(fee_rate)
+        rate_str = self.window.format_fee_rate(fee_rate) if fee_rate else _('unknown')
        if self.dyn:
            tooltip = fee_levels[pos] + '\n' + rate_str
        else: