diff --git a/django_filters/rest_framework/backends.py b/django_filters/rest_framework/backends.py
index 835a67f9a..2cc0f7012 100644
--- a/django_filters/rest_framework/backends.py
+++ b/django_filters/rest_framework/backends.py
@@ -154,7 +154,7 @@ def get_schema_operation_parameters(self, view):
             return []
 
         parameters = []
-        for field_name, field in filterset_class.base_filters.items():
+        for field_name, field in filterset_class().filters.items():
             parameter = {
                 'name': field_name,
                 'required': field.extra['required'],
diff --git a/tests/rest_framework/models.py b/tests/rest_framework/models.py
index a6f5e8a1c..f9be5e8f6 100644
--- a/tests/rest_framework/models.py
+++ b/tests/rest_framework/models.py
@@ -29,4 +29,4 @@ class Meta:
 
 
 class CategoryItem(BaseFilterableItem):
-    category = models.CharField(max_length=10, choices=(("home", "Home"), ("office", "Office")))
+    category = models.CharField('item category', max_length=10, choices=(("home", "Home"), ("office", "Office")))
diff --git a/tests/rest_framework/test_backends.py b/tests/rest_framework/test_backends.py
index 124383363..88d4d17b8 100644
--- a/tests/rest_framework/test_backends.py
+++ b/tests/rest_framework/test_backends.py
@@ -260,7 +260,7 @@ def test_get_operation_parameters_with_filterset_fields_list_with_choices(self):
                 'name': 'category',
                 'required': False,
                 'in': 'query',
-                'description': 'category',
+                'description': 'Item category',
                 'schema': {
                     'type': 'string',
                     'enum': ['home', 'office']