diff --git a/netbox/virtualization/models/virtualmachines.py b/netbox/virtualization/models/virtualmachines.py
index 970167bf3..aa913cc9e 100644
--- a/netbox/virtualization/models/virtualmachines.py
+++ b/netbox/virtualization/models/virtualmachines.py
@@ -242,6 +242,10 @@ class VirtualMachine(ContactsMixin, RenderConfigMixin, ConfigContextModel, Prima
         else:
             return None
 
+    @property
+    def disk_size(self):
+        return sum(self.virtualdisks.all().values_list('size', flat=True))
+
 
 class VMInterface(NetBoxModel, BaseInterface, TrackingModelMixin):
     virtual_machine = models.ForeignKey(
diff --git a/netbox/virtualization/views.py b/netbox/virtualization/views.py
index 486d69057..313df3ee8 100644
--- a/netbox/virtualization/views.py
+++ b/netbox/virtualization/views.py
@@ -352,8 +352,7 @@ class VirtualMachineListView(generic.ObjectListView):
 
 @register_model_view(VirtualMachine)
 class VirtualMachineView(generic.ObjectView):
-    queryset = VirtualMachine.objects.all().annotate(
-        disk_size=Sum('virtualdisks__size'))
+    queryset = VirtualMachine.objects.all()
 
 
 @register_model_view(VirtualMachine, 'interfaces')