diff --git a/electrum/simple_config.py b/electrum/simple_config.py
index 71a33567b..34d75eebb 100644
--- a/electrum/simple_config.py
+++ b/electrum/simple_config.py
@@ -617,7 +617,7 @@ class SimpleConfig(Logger):
         return format_satoshis(x, self.num_zeros, self.decimal_point, is_diff=is_diff, whitespaces=whitespaces)
 
     def format_amount_and_units(self, amount):
-        return self.format_amount(amount) + ' '+ self.base_unit()
+        return self.format_amount(amount) + ' '+ self.get_base_unit()
 
     def format_fee_rate(self, fee_rate):
         return format_fee_satoshis(fee_rate/1000, num_zeros=self.num_zeros) + ' sat/byte'