diff --git a/tools/python/xen/util/blkif.py b/tools/python/xen/util/blkif.py
index 7e4bad5648..74935774a6 100644
--- a/tools/python/xen/util/blkif.py
+++ b/tools/python/xen/util/blkif.py
@@ -20,7 +20,7 @@ def blkdev_name_to_number(name):
     devnum = None
 
     try:
-        return os.stat(n).st_rdev
+        return (devname, os.stat(n).st_rdev)
     except Exception, ex:
         pass