diff --git a/electrum/gui/qt/paytoedit.py b/electrum/gui/qt/paytoedit.py
index 8998467be..315c97d7e 100644
--- a/electrum/gui/qt/paytoedit.py
+++ b/electrum/gui/qt/paytoedit.py
@@ -199,7 +199,7 @@ class PayToEdit(QWidget, Logger, GenericInputHandler):
             self.line_edit.setText(text)
             self.text_edit.setText(text)
 
-    def setFocus(self, reason=None) -> None:
+    def setFocus(self, reason=Qt.OtherFocusReason) -> None:
         if self.multiline:
             self.text_edit.setFocus(reason)
         else: