diff --git a/gramps/gui/editors/editmediaref.py b/gramps/gui/editors/editmediaref.py
index 37abc4daf..0a01552b9 100644
--- a/gramps/gui/editors/editmediaref.py
+++ b/gramps/gui/editors/editmediaref.py
@@ -432,6 +432,7 @@ class EditMediaRef(EditReference):
     def _connect_signals(self):
         self.define_cancel_button(self.top.get_object('button84'))
         self.define_ok_button(self.top.get_object('button82'),self.save)
+        self.define_help_button(self.top.get_object('button104'))
 
     def _connect_db_signals(self):
         """