diff --git a/django/contrib/gis/admin/__init__.py b/django/contrib/gis/admin/__init__.py
index 20315c5c79..2b56276ee7 100644
--- a/django/contrib/gis/admin/__init__.py
+++ b/django/contrib/gis/admin/__init__.py
@@ -1,5 +1,5 @@
 # Getting the normal admin routines, classes, and `site` instance.
-from django.contrib.admin import autodiscover, site, StackedInline, TabularInline, HORIZONTAL, VERTICAL
+from django.contrib.admin import autodiscover, site, AdminSite, ModelAdmin, StackedInline, TabularInline, HORIZONTAL, VERTICAL
 
 # Geographic admin options classes and widgets.
 from django.contrib.gis.admin.options import GeoModelAdmin