diff --git a/django/contrib/flatpages/models.py b/django/contrib/flatpages/models.py
index 733706257c..bc2a392121 100644
--- a/django/contrib/flatpages/models.py
+++ b/django/contrib/flatpages/models.py
@@ -10,7 +10,7 @@ class FlatPage(models.Model):
     content = models.TextField(_('content'))
     enable_comments = models.BooleanField(_('enable comments'))
     template_name = models.CharField(_('template name'), maxlength=70, blank=True,
-        help_text=_("Example: 'flatpages/contact_page'. If this isn't provided, the system will use 'flatpages/default'."))
+        help_text=_("Example: 'flatpages/contact_page.html'. If this isn't provided, the system will use 'flatpages/default.html'."))
     registration_required = models.BooleanField(_('registration required'), help_text=_("If this is checked, only logged-in users will be able to view the page."))
     sites = models.ManyToManyField(Site)
     class Meta: