Index: cloud-init-0.6.3-bzr532/cloudinit/DataSource.py
===================================================================
--- cloud-init-0.6.3-bzr532.orig/cloudinit/DataSource.py
+++ cloud-init-0.6.3-bzr532/cloudinit/DataSource.py
@@ -136,7 +136,7 @@ class DataSource:
             # make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
             lhost = self.metadata['local-hostname']
             if is_ipv4(lhost):
-                toks = "ip-%s" % lhost.replace(".", "-")
+                toks = ["ip-%s" % lhost.replace(".", "-")]
             else:
                 toks = lhost.split(".")