diff --git a/api-ref/source/v3/service-catalog.inc b/api-ref/source/v3/service-catalog.inc
index 689c41958a..4315008917 100644
--- a/api-ref/source/v3/service-catalog.inc
+++ b/api-ref/source/v3/service-catalog.inc
@@ -318,6 +318,7 @@ Parameters
 
    - interface: interface_query
    - service_id: service_id_query
+   - region_id: region_id_query
 
 Response
 --------