diff --git a/circle/vm/models/__init__.py b/circle/vm/models/__init__.py
index 26f5c49..e6afe50 100644
--- a/circle/vm/models/__init__.py
+++ b/circle/vm/models/__init__.py
@@ -7,7 +7,6 @@ from .common import BaseResourceConfigModel
 from .common import Lease
 from .common import NamedBaseResourceConfig
 from .common import Trait
-from .instance import InstanceActiveManager
 from .instance import VirtualMachineDescModel
 from .instance import InstanceTemplate
 from .instance import Instance
@@ -19,7 +18,7 @@ from .network import Interface
 from .node import Node
 
 __all__ = [
-    'InstanceActivity', 'InstanceActiveManager', 'BaseResourceConfigModel',
+    'InstanceActivity', 'BaseResourceConfigModel',
     'NamedBaseResourceConfig', 'VirtualMachineDescModel', 'InstanceTemplate',
     'Instance', 'instance_activity', 'post_state_changed', 'pre_state_changed',
     'InterfaceTemplate', 'Interface', 'Trait', 'Node', 'NodeActivity', 'Lease',
diff --git a/circle/vm/models/instance.py b/circle/vm/models/instance.py
index 89710e8..9b49d92 100644
--- a/circle/vm/models/instance.py
+++ b/circle/vm/models/instance.py
@@ -38,6 +38,7 @@ from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _, ugettext_noop
 
 from model_utils import Choices
+from model_utils.managers import QueryManager
 from model_utils.models import TimeStampedModel, StatusModel
 from taggit.managers import TaggableManager
 
@@ -92,13 +93,6 @@ def find_unused_vnc_port():
         return port
 
 
-class InstanceActiveManager(Manager):
-
-    def get_query_set(self):
-        return super(InstanceActiveManager,
-                     self).get_query_set().filter(destroyed_at=None)
-
-
 class VirtualMachineDescModel(BaseResourceConfigModel):
 
     """Abstract base for virtual machine describing models.
@@ -264,7 +258,7 @@ class Instance(AclBase, VirtualMachineDescModel, StatusModel, OperatedMixin,
                                  help_text=_("The virtual machine's time of "
                                              "destruction."))
     objects = Manager()
-    active = InstanceActiveManager()
+    active = QueryManager(destroyed_at=None)
 
     class Meta:
         app_label = 'vm'