diff --git a/zuul/site-variables.yaml b/zuul/site-variables.yaml
index 6bafd11e26..ade2906398 100644
--- a/zuul/site-variables.yaml
+++ b/zuul/site-variables.yaml
@@ -7,6 +7,10 @@ zuul_site_mirror_fqdn: >-
   {%- else -%}
   mirror.{{ nodepool.region | lower }}.{{ nodepool.cloud | lower }}.opendev.org
   {%- endif -%}
+# This is explicitly empty to disable dockerhub mirroring
+# TODO we should port all of our mirroring config into here as different
+# mirror setup roles support this functionality.
+zuul_site_mirror_info: {}
 zuul_site_ipv4_route_required: true
 zuul_site_traceroute_host: opendev.org
 zuul_site_image_manifest_files: