diff --git a/nova/network/neutronv2/api.py b/nova/network/neutronv2/api.py
index a41924d..8a44f99 100644
--- a/nova/network/neutronv2/api.py
+++ b/nova/network/neutronv2/api.py
@@ -939,6 +939,8 @@ class API(base.Base):
             if port['network_id'] == net['id']:
                 network_name = net['name']
                 break
+        else:
+            network_name = ""
 
         bridge = None
         ovs_interfaceid = None