diff --git a/src/models/NSDModel.ts b/src/models/NSDModel.ts
index 584f4e0..e4f94b0 100644
--- a/src/models/NSDModel.ts
+++ b/src/models/NSDModel.ts
@@ -49,6 +49,7 @@
     vld: VLD[];
     _admin: VNFDAdminDetails;
     _id: string;
+    _links?: string;
     'constituent-vnfr-ref': string[];
 }