diff --git a/rest_framework/filters.py b/rest_framework/filters.py
index 3f4730da8..d86a96125 100644
--- a/rest_framework/filters.py
+++ b/rest_framework/filters.py
@@ -375,5 +375,6 @@ class OrderingFilter(BaseFilterBackend):
                 'schema': {
                     'type': 'string',
                 },
+                'enum': view.ordering_fields
             },
         ]