diff --git a/slapos/format.py b/slapos/format.py
index 326c90b5067d16789c73a58d5ee75203d3ce4889..5abb13fec3bd9273b8cb94d7abf3502fb85d9672 100644
--- a/slapos/format.py
+++ b/slapos/format.py
@@ -396,7 +396,7 @@ class Computer(object):
     if self.ipv6_interface:
       interface_name = self.ipv6_interface
     else:
-      interface_name = self.name
+      interface_name = self.interface.name
     for partition in self.partition_list:
       try:
         for address in partition.address_list: