diff --git a/specification/vmware/Microsoft.AVS.Management/tspconfig.yaml b/specification/vmware/Microsoft.AVS.Management/tspconfig.yaml
index 46a5865c4743..a4c6cdf616b2 100644
--- a/specification/vmware/Microsoft.AVS.Management/tspconfig.yaml
+++ b/specification/vmware/Microsoft.AVS.Management/tspconfig.yaml
@@ -41,7 +41,7 @@ options:
     namespace: "com.azure.resourcemanager.avs"
     service-name: "Avs"
     flavor: azure
-    use-object-as-unknown: true
+    use-object-for-unknown: true
 
   "@azure-tools/typespec-python":
     service-dir: "sdk/compute"