Index: docs/ref/contrib/admin.txt
===================================================================
--- docs/ref/contrib/admin.txt	(revision 9814)
+++ docs/ref/contrib/admin.txt	(working copy)
@@ -1071,6 +1071,7 @@
 Not every template in ``contrib\admin\templates\admin`` may be overridden per
 app or per model. The following can:
 
+    * ``app_index.html``
     * ``change_form.html``
     * ``change_list.html``
     * ``delete_confirmation.html``
Index: django/contrib/admin/sites.py
===================================================================
--- django/contrib/admin/sites.py	(revision 9814)
+++ django/contrib/admin/sites.py	(working copy)
@@ -390,7 +390,8 @@
             'root_path': self.root_path,
         }
         context.update(extra_context or {})
-        return render_to_response(self.app_index_template or 'admin/app_index.html', context,
+        return render_to_response(self.app_index_template or ('admin/%s/app_index.html' % app_label,
+            'admin/app_index.html'), context,
             context_instance=template.RequestContext(request)
         )