diff --git a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/stable/2022-05-01/mfe.json b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/stable/2022-05-01/mfe.json
index a570d7eb0611..8acc09a82b4e 100644
--- a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/stable/2022-05-01/mfe.json
+++ b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/stable/2022-05-01/mfe.json
@@ -5973,6 +5973,7 @@
         "Debug"
       ],
       "type": "string",
+      "x-nullable": true,
       "x-ms-enum": {
         "name": "BatchLoggingLevel",
         "modelAsString": true,