diff --git a/specification/deviceprovisioningservices/DeviceProvisioningServices.Management/models.tsp b/specification/deviceprovisioningservices/DeviceProvisioningServices.Management/models.tsp
index 14dae9ce667c..6633ffc0f449 100644
--- a/specification/deviceprovisioningservices/DeviceProvisioningServices.Management/models.tsp
+++ b/specification/deviceprovisioningservices/DeviceProvisioningServices.Management/models.tsp
@@ -135,7 +135,7 @@ union PrivateLinkServiceConnectionStatus {
 }
 
 /**
- * Device Registry Namespace MI authentication type: UserAssigned, SystemAssigned.
+ * Device Registry Namespace MI authentication type: UserAssigned, and SystemAssigned.
  */
 union DeviceRegistryNamespaceAuthenticationType {
   string,
diff --git a/specification/deviceprovisioningservices/resource-manager/Microsoft.Devices/preview/2025-02-01-preview/iotdps.json b/specification/deviceprovisioningservices/resource-manager/Microsoft.Devices/preview/2025-02-01-preview/iotdps.json
index 6b569e8e4962..381d1827eac2 100644
--- a/specification/deviceprovisioningservices/resource-manager/Microsoft.Devices/preview/2025-02-01-preview/iotdps.json
+++ b/specification/deviceprovisioningservices/resource-manager/Microsoft.Devices/preview/2025-02-01-preview/iotdps.json
@@ -1813,7 +1813,7 @@
     },
     "DeviceRegistryNamespaceAuthenticationType": {
       "type": "string",
-      "description": "Device Registry Namespace MI authentication type: UserAssigned, SystemAssigned.",
+      "description": "Device Registry Namespace MI authentication type: UserAssigned, and SystemAssigned.",
       "enum": [
         "UserAssigned",
         "SystemAssigned"