diff --git a/src/vnfd/ref11_vnf/ref11_vnfd.yaml b/src/vnfd/ref11_vnf/ref11_vnfd.yaml
index 00b3394..f308282 100644
--- a/src/vnfd/ref11_vnf/ref11_vnfd.yaml
+++ b/src/vnfd/ref11_vnf/ref11_vnfd.yaml
@@ -18,7 +18,7 @@
             vendor: ETSI
             internal-connection-point:
             -   id-ref: 'iface11'
-                id-ref: 'iface21'
+            -   id-ref: 'iface21'
         vdu:
         -   external-interface:
             -   name: iface10