diff --git a/lib/backend.py b/lib/backend.py
index 6c156a3a8d5539c4b246f3932a36c1e12080f680..7d02da8629c1aeb8f03c32f88a41169586c9d833 100644
--- a/lib/backend.py
+++ b/lib/backend.py
@@ -221,7 +221,7 @@ def GetVolumeList(vg_name):
                  result.output)
     return {}
 
-  lvlist = [line.split() for line in result.output.splitlines()]
+  lvlist = [line.split() for line in result.stdout.splitlines()]
   return dict(lvlist)