diff --git a/wagtail/wagtailcore/models.py b/wagtail/wagtailcore/models.py
index 5b0843d2c..112c2474d 100644
--- a/wagtail/wagtailcore/models.py
+++ b/wagtail/wagtailcore/models.py
@@ -566,8 +566,7 @@ class Page(six.with_metaclass(PageBase, AbstractPage, index.Indexed, Clusterable
             errors.append(
                 checks.Error(
                     "Manager does not inherit from PageManager",
-                    hint="Ensure that custom Page managers inherit from {}.{}".format(
-                        PageManager.__module__, PageManager.__name__),
+                    hint="Ensure that custom Page managers inherit from wagtail.wagtailcore.models.PageManager",
                     obj=cls,
                     id='wagtailcore.E002',
                 )