diff --git a/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-04-01-preview/services.json b/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-04-01-preview/services.json
index 6e8a5f38b472..11ff2ddcd78d 100644
--- a/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-04-01-preview/services.json
+++ b/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-04-01-preview/services.json
@@ -296,7 +296,7 @@
         }
       },
       "required": [
-        "SqlDedicatedGatewayEndpoint"
+        "sqlDedicatedGatewayEndpoint"
       ]
     },
     "RegionalServiceResource": {