diff --git a/systemvm/patches/debian/config/opt/cloud/bin/cs_guestnetwork.py b/systemvm/patches/debian/config/opt/cloud/bin/cs_guestnetwork.py
index 71d41384388..4f9f3a06912 100644
--- a/systemvm/patches/debian/config/opt/cloud/bin/cs_guestnetwork.py
+++ b/systemvm/patches/debian/config/opt/cloud/bin/cs_guestnetwork.py
@@ -28,5 +28,5 @@ def merge(dbag, gn):
         if dbag[dev][0]['device'] == gn['device']:
             dbag[dev].remove(dbag[dev][0])
     if gn['add']:
-        dbag.setdefault(gn['device'], []).append()
+        dbag.setdefault(gn['device'], []).append(gn)
     return dbag