diff --git a/code/API_definitions/number-recycling.yaml b/code/API_definitions/number-recycling.yaml
index b8d5221..279feda 100644
--- a/code/API_definitions/number-recycling.yaml
+++ b/code/API_definitions/number-recycling.yaml
@@ -456,13 +456,13 @@ components:
                       - 503
                   code:
                     enum:
-                      - SERVICE_UNAVAILABLE
+                      - UNAVAILABLE
           examples:
             GENERIC_503_UNAVAILABLE:
               description: Service is not available. Temporary situation usually related to maintenance process in the server side
               value:
                 status: 503
-                code: SERVICE_UNAVAILABLE
+                code: UNAVAILABLE
                 message: Service Unavailable.
 
     Generic504: