diff --git a/electrum/gui/qml/components/controls/RequestExpiryComboBox.qml b/electrum/gui/qml/components/controls/RequestExpiryComboBox.qml
index 6f5d0121b..00cb8912f 100644
--- a/electrum/gui/qml/components/controls/RequestExpiryComboBox.qml
+++ b/electrum/gui/qml/components/controls/RequestExpiryComboBox.qml
@@ -29,7 +29,7 @@ ElComboBox {
     }
 
     onCurrentValueChanged: {
-        if (activeFocus)
+        if (activeFocus && currentValue)
             Config.requestExpiry = currentValue
     }
 }