diff --git a/lib/objects.py b/lib/objects.py
index a4c58d1a7ce5aa975268bde67c942ae5066715fa..d941ed0a8c55ac39fb5e142cfe6e53e6624fa4d0 100644
--- a/lib/objects.py
+++ b/lib/objects.py
@@ -508,8 +508,6 @@ class Instance(TaggableObject):
     "hvparams",
     "beparams",
     "status",
-    "memory",
-    "vcpus",
     "nics",
     "disks",
     "disk_template",