diff --git a/src/calibre/gui2/viewer/ui.py b/src/calibre/gui2/viewer/ui.py
index 19092aebf1..b840a589d9 100644
--- a/src/calibre/gui2/viewer/ui.py
+++ b/src/calibre/gui2/viewer/ui.py
@@ -51,7 +51,7 @@ class Reference(QLineEdit):  # {{{
             'Go to a reference. To get reference numbers, use the <i>reference '
             'mode</i>, by clicking the reference mode button in the toolbar.')))
         if hasattr(self, 'setPlaceholderText'):
-            self.setPlaceholderText(_('Go to...'))
+            self.setPlaceholderText(_('Go to a reference number...'))
         self.editingFinished.connect(self.editing_finished)
 
     def editing_finished(self):