diff --git a/api-ref/source/v3/service-catalog.inc b/api-ref/source/v3/service-catalog.inc
index e9a43c0f31..8fab8245b5 100644
--- a/api-ref/source/v3/service-catalog.inc
+++ b/api-ref/source/v3/service-catalog.inc
@@ -354,7 +354,7 @@ Request Parameters
    - enabled: endpoint_enabled_notRequired
    - interface: endpoint_interface
    - service_id: service_id
-   - region_id: region_id
+   - region_id: region_id_1
 
 Request Example
 ---------------