diff --git a/api-ref/source/v3/service-catalog.inc b/api-ref/source/v3/service-catalog.inc
index 69034fce77..43cbbb41ef 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
 ---------------