diff --git a/zendesk/custom_object.go b/zendesk/custom_object.go
index c4f7f70..abdce22 100644
--- a/zendesk/custom_object.go
+++ b/zendesk/custom_object.go
@@ -72,7 +72,8 @@ func (z *Client) CreateCustomObjectRecord(
 // CustomObjectListOptions custom object list options
 type CustomObjectListOptions struct {
 	PageOptions
-	ExternalIds []string `url:"external_ids"`
+	Ids         []string `url:"filter[ids]"`
+	ExternalIds []string `url:"filter[external_ids]"`
 }
 
 // ListCustomObjectRecords list objects