diff --git a/schemas/2021-01-15/Microsoft.Web.json b/schemas/2021-01-15/Microsoft.Web.json
index 217225d3a..ef0a857a0 100644
--- a/schemas/2021-01-15/Microsoft.Web.json
+++ b/schemas/2021-01-15/Microsoft.Web.json
@@ -5322,7 +5322,7 @@
         },
         "domainValidationMethod": {
           "type": "string",
-          "description": "Method of domain validation for free cert"
+          "description": "Method of domain validation for free cert. Possible values include: 'CNameValidationValue', 'HttpTokenValidationValue'"
         },
         "hostNames": {
           "oneOf": [