diff --git a/django/contrib/admin/views/main.py b/django/contrib/admin/views/main.py
index 2e3e758164..e446cc716e 100644
--- a/django/contrib/admin/views/main.py
+++ b/django/contrib/admin/views/main.py
@@ -28,13 +28,11 @@ from django.utils.translation import gettext
 # Changelist settings
 ALL_VAR = 'all'
 ORDER_VAR = 'o'
-ORDER_TYPE_VAR = 'ot'
 PAGE_VAR = 'p'
 SEARCH_VAR = 'q'
 ERROR_FLAG = 'e'
 
-IGNORED_PARAMS = (
-    ALL_VAR, ORDER_VAR, ORDER_TYPE_VAR, SEARCH_VAR, IS_POPUP_VAR, TO_FIELD_VAR)
+IGNORED_PARAMS = (ALL_VAR, ORDER_VAR, SEARCH_VAR, IS_POPUP_VAR, TO_FIELD_VAR)
 
 
 class ChangeListSearchForm(forms.Form):