diff --git a/p4app/controller.py b/p4app/controller.py
index 268250b..353691e 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -167,7 +167,7 @@ class L2Controller(object):
 
         self.controller.table_clear("v6_addresses")
         for v6addr in self.v6_addresses[self.mode]:
-            icmp6_addr = str(self.gen_ndp_multicast_addr(v6addr))
+            icmp6_addr = str(self.gen_ndp_multicast_addr(v6addr['addr']))
 
             self.controller.table_add("v6_addresses", "controller_reply", [v6addr['addr']])
             self.controller.table_add("v6_addresses", "controller_reply", [icmp6_addr])