diff --git a/docs/ref/contrib/admin/index.txt b/docs/ref/contrib/admin/index.txt
index ba8f1acbd8..7bee6b56f8 100644
--- a/docs/ref/contrib/admin/index.txt
+++ b/docs/ref/contrib/admin/index.txt
@@ -1281,11 +1281,11 @@ provided some extra mapping data that would not otherwise be available::
             # ...
             pass
 
-        def change_view(self, request, object_id, extra_context=None):
+        def change_view(self, request, object_id, form_url='', extra_context=None):
             extra_context = extra_context or {}
             extra_context['osm_data'] = self.get_osm_info()
             return super(MyModelAdmin, self).change_view(request, object_id,
-                extra_context=extra_context)
+                form_url, extra_context=extra_context)
 
 .. versionadded:: 1.4