diff --git a/playbooks/kayobe-overcloud-upgrade-base/overrides.yml.j2 b/playbooks/kayobe-overcloud-upgrade-base/overrides.yml.j2
index 9fec45fdd..0e169a24c 100644
--- a/playbooks/kayobe-overcloud-upgrade-base/overrides.yml.j2
+++ b/playbooks/kayobe-overcloud-upgrade-base/overrides.yml.j2
@@ -26,3 +26,10 @@ pip_index_url: "http://{{ zuul_site_mirror_fqdn }}/pypi/simple"
 # are using for SSH to be removed. Use a dummy interface.
 aio_bridge_ports:
   - dummy1
+
+# FIXME(mgoddard): Ironic has an issue where nodes will be switched to use the
+# direct deploy interface during upgrade, if it is enabled. This should be
+# fixed via https://review.opendev.org/755295, after which this configuration
+# may be removed.
+kolla_ironic_enabled_deploy_interfaces:
+  - iscsi