diff --git a/electrum/payment_identifier.py b/electrum/payment_identifier.py
index 67b78a6ce..8b8cb70ca 100644
--- a/electrum/payment_identifier.py
+++ b/electrum/payment_identifier.py
@@ -386,8 +386,8 @@ class PaymentIdentifier(Logger):
                 raise Exception("Unexpected missing LNURL data")
 
             if not (self.lnurl_data.min_sendable_sat <= amount_sat <= self.lnurl_data.max_sendable_sat):
-                self.error = _('Amount must be between %d and %d sat.') \
-                    % (self.lnurl_data.min_sendable_sat, self.lnurl_data.max_sendable_sat)
+                self.error = _('Amount must be between {} and {} sat.').format(
+                    self.lnurl_data.min_sendable_sat, self.lnurl_data.max_sendable_sat)
                 self.set_state(PaymentIdentifierState.INVALID_AMOUNT)
                 return