diff --git a/tasks/tempest_resources.yml b/tasks/tempest_resources.yml
index d70a960f..37d7adf3 100644
--- a/tasks/tempest_resources.yml
+++ b/tasks/tempest_resources.yml
@@ -150,7 +150,7 @@
         validate_certs: "{{ tempest_keystone_interface_insecure | ternary(false, true) }}"
         name: "{{ tempest_private_net_name }}"
         provider_network_type: "{{ tempest_private_net_provider_type }}"
-        provider_segmentation_id: "{{ tempest_private_net_seg_id | default(omit) }}"
+        provider_segmentation_id: "{{ tempest_private_net_seg_id | default(omit, true) }}"
         project: "{{ keystone_demo_tenant_id }}"
       register: tempest_private_network
       until: tempest_private_network is success
@@ -173,7 +173,7 @@
         name: "{{ tempest_public_net_name }}"
         provider_network_type: "{{ tempest_public_net_provider_type }}"
         provider_physical_network: "{{ tempest_public_net_physical_name | default(omit) }}"
-        provider_segmentation_id: "{{ tempest_public_net_seg_id | default(omit) }}"
+        provider_segmentation_id: "{{ tempest_public_net_seg_id | default(omit, true) }}"
         external: "{{ tempest_public_router_external }}"
         project: "{{ keystone_demo_tenant_id }}"
       register: tempest_public_network