diff --git a/openstack_dashboard/dashboards/project/networks/subnets/workflows.py b/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
index 0f4366e182..a457682570 100644
--- a/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
@@ -92,6 +92,7 @@ class CreateSubnet(network_workflows.CreateNetwork):
 
 
 class UpdateSubnetInfoAction(CreateSubnetInfoAction):
+    use_required_attribute = False
     address_source = forms.ThemableChoiceField(widget=forms.HiddenInput(),
                                                required=False)
     subnetpool = forms.ThemableChoiceField(widget=forms.HiddenInput(),