diff --git a/specification/blueprint/resource-manager/Microsoft.Blueprint/preview/2018-11-01-preview/blueprintDefinition.json b/specification/blueprint/resource-manager/Microsoft.Blueprint/preview/2018-11-01-preview/blueprintDefinition.json
index ccd636c4873d..80b2b414a40e 100644
--- a/specification/blueprint/resource-manager/Microsoft.Blueprint/preview/2018-11-01-preview/blueprintDefinition.json
+++ b/specification/blueprint/resource-manager/Microsoft.Blueprint/preview/2018-11-01-preview/blueprintDefinition.json
@@ -824,7 +824,7 @@
           ],
           "x-ms-enum": {
             "name": "BlueprintTargetScope",
-            "modelAsString": false,
+            "modelAsString": true,
             "values": [
               {
                   "value": "subscription",