diff --git a/tools/python/xen/xend/server/blkif.py b/tools/python/xen/xend/server/blkif.py
index cb93e64005..51ca12b131 100755
--- a/tools/python/xen/xend/server/blkif.py
+++ b/tools/python/xen/xend/server/blkif.py
@@ -42,7 +42,7 @@ class BlkifController(DevController):
         
         typedev = sxp.child_value(config, 'dev')
         if re.match('^ioemu:', typedev):
-            return
+            return (0,{},{})
 
         devid = blkif.blkdev_name_to_number(sxp.child_value(config, 'dev'))