diff --git a/electrum/gui/qt/address_list.py b/electrum/gui/qt/address_list.py
index 4656b2778..0977cf9e7 100644
--- a/electrum/gui/qt/address_list.py
+++ b/electrum/gui/qt/address_list.py
@@ -187,6 +187,8 @@ class AddressList(MyTreeView):
         menu = QMenu()
         if not multi_select:
             idx = self.indexAt(position)
+            if not idx.isValid():
+                return
             col = idx.column()
             item = self.model().itemFromIndex(idx)
             if not item:
diff --git a/electrum/gui/qt/utxo_list.py b/electrum/gui/qt/utxo_list.py
index c18d4426f..f549cc9cf 100644
--- a/electrum/gui/qt/utxo_list.py
+++ b/electrum/gui/qt/utxo_list.py
@@ -124,6 +124,8 @@ class UTXOList(MyTreeView):
                 menu.addAction(_("Details"), lambda: self.parent.show_transaction(tx, label))
             # "Copy ..."
             idx = self.indexAt(position)
+            if not idx.isValid():
+                return
             col = idx.column()
             column_title = self.model().horizontalHeaderItem(col).text()
             copy_text = self.model().itemFromIndex(idx).text() if col != self.Columns.OUTPOINT else selected[0]