diff --git a/recircle/instance/models.py b/recircle/instance/models.py
index a47c67d..58a3557 100644
--- a/recircle/instance/models.py
+++ b/recircle/instance/models.py
@@ -268,7 +268,7 @@ class Instance(BaseMachineDescriptor):
         flav = {
             "name": flavor.name,
             "ram": flavor.ram,
-            "vcpus": flavor.vcpus,
+            "vcpu": flavor.vcpu,
             "disk": flavor.initial_disk
         }
         try: