diff --git a/src/calibre/gui2/metadata/single.py b/src/calibre/gui2/metadata/single.py
index 0a8fba926f..e0d8201e8a 100644
--- a/src/calibre/gui2/metadata/single.py
+++ b/src/calibre/gui2/metadata/single.py
@@ -658,7 +658,7 @@ class MetadataSingleDialogBase(QDialog):
         self.save_state()
         if self.was_data_edited and not confirm(
                 title=_('Are you sure?'), name='confirm-cancel-edit-single-metadata', msg=_(
-                    'You will lose all unsaved changes, are you sure?'), parent=self):
+                    'You will lose all unsaved changes. Are you sure?'), parent=self):
             return
         QDialog.reject(self)