diff --git a/zuul.d/gerrit-projects.yaml b/zuul.d/gerrit-projects.yaml
new file mode 100644
index 0000000000..48587bb30e
--- /dev/null
+++ b/zuul.d/gerrit-projects.yaml
@@ -0,0 +1,43 @@
+# This file should be moved to the opendev tenant when system-config
+# is moved.
+
+# List gerrit projects that we use so that we can look up their
+# default branches.
+- project:
+    name: gerrit.googlesource.com/gerrit
+- project:
+    name: gerrit.googlesource.com/java-prettify
+- project:
+    name: gerrit.googlesource.com/jgit
+- project:
+    name: gerrit.googlesource.com/plugins/codemirror-editor
+- project:
+    name: gerrit.googlesource.com/plugins/commit-message-length-validator
+- project:
+    name: gerrit.googlesource.com/plugins/delete-project
+- project:
+    name: gerrit.googlesource.com/plugins/download-commands
+- project:
+    name: gerrit.googlesource.com/plugins/gitiles
+- project:
+    name: gerrit.googlesource.com/plugins/hooks
+- project:
+    name: gerrit.googlesource.com/plugins/its-base
+- project:
+    name: gerrit.googlesource.com/plugins/its-storyboard
+- project:
+    name: gerrit.googlesource.com/plugins/plugin-manager
+- project:
+    name: gerrit.googlesource.com/plugins/replication
+- project:
+    name: gerrit.googlesource.com/plugins/reviewnotes
+- project:
+    name: gerrit.googlesource.com/plugins/singleusergroup
+- project:
+    name: gerrit.googlesource.com/plugins/webhooks
+- project:
+    name: gerrit.googlesource.com/plugins/zuul-results-summary
+- project:
+    name: gerrit.googlesource.com/plugins/zuul-results-summary
+- project:
+    name: gerrit.googlesource.com/polymer-bridges