diff --git a/src/calibre/gui2/dialogs/tag_editor.py b/src/calibre/gui2/dialogs/tag_editor.py
index d248af8940..6c1ec7cbf8 100644
--- a/src/calibre/gui2/dialogs/tag_editor.py
+++ b/src/calibre/gui2/dialogs/tag_editor.py
@@ -124,7 +124,7 @@ class TagEditor(QDialog, Ui_TagEditor):
         row_indices = list(self.available_tags.selectionModel().selectedRows())
 
         if not row_indices:
-            error_dialog(self, 'No tags selected', 'You must select at least one tag from the list of Available tags.').exec()
+            error_dialog(self, _('No tags selected'), _('You must select at least one tag from the list of Available tags.')).exec()
             return
         if not confirm(
             _('Deleting tags is done immediately and there is no undo.'),