diff --git a/electrum/gui/qt/completion_text_edit.py b/electrum/gui/qt/completion_text_edit.py
index b34d976c6..ded06d15c 100644
--- a/electrum/gui/qt/completion_text_edit.py
+++ b/electrum/gui/qt/completion_text_edit.py
@@ -82,7 +82,7 @@ class CompletionTextEdit(ButtonsTextEdit):
 
         QPlainTextEdit.keyPressEvent(self, e)
 
-        ctrlOrShift = e.modifiers() and (Qt.ControlModifier or Qt.ShiftModifier)
+        ctrlOrShift = bool(e.modifiers() & (Qt.ControlModifier | Qt.ShiftModifier))
         if self.completer is None or (ctrlOrShift and not e.text()):
             return