diff --git a/wally/start_vms.py b/wally/start_vms.py
index d9bde0c..8556b6a 100644
--- a/wally/start_vms.py
+++ b/wally/start_vms.py
@@ -506,7 +506,7 @@
     for g in nova.server_groups.list():
         if g.members == []:
             if re.match(template, g.name):
-                yield str(g.name)
+                yield str(g.id)
 
 
 def create_vms_mt(nova, amount, group_name, keypair_name, img_name,