diff --git a/nova/compute/instance_types.py b/nova/compute/instance_types.py
index 8cfa2f8da497..1275a6fddd1a 100644
--- a/nova/compute/instance_types.py
+++ b/nova/compute/instance_types.py
@@ -64,7 +64,7 @@ def create(name, memory, vcpus, local_gb, flavorid, swap=0,
 def destroy(name):
     """Marks instance types as deleted."""
     if name is None:
-        raise exception.InstanceNotFound(instance_id=instance_name)
+        raise exception.InvalidInstanceType(instance_type=name)
     else:
         try:
             db.instance_type_destroy(context.get_admin_context(), name)
@@ -76,7 +76,7 @@ def destroy(name):
 def purge(name):
     """Removes instance types from database."""
     if name is None:
-        raise exception.InnstanceNotFound(instance_id=name)
+        raise exception.InvalidInstanceType(instance_type=name)
     else:
         try:
             db.instance_type_purge(context.get_admin_context(), name)