diff --git a/rest_auth/urls.py b/rest_auth/urls.py
index 9f039e2..2d7b358 100644
--- a/rest_auth/urls.py
+++ b/rest_auth/urls.py
@@ -21,6 +21,6 @@ urlpatterns = [
 ]
 
 if getattr(settings, 'REST_USE_KNOX', False):
-    urlpatterns.extend([
-        url(r'^logoutall/$', LogoutAllView.as_view(), name='rest_logout_all'),
-    ])
+    urlpatterns.append(
+        url(r'^logoutall/$', LogoutAllView.as_view(), name='rest_logout_all')
+    )