diff --git a/solr/renovate-config-9x.js b/solr/renovate-config-9x.js
index c4bb5d80..d673cca5 100644
--- a/solr/renovate-config-9x.js
+++ b/solr/renovate-config-9x.js
@@ -8,5 +8,6 @@ module.exports = {
   baseBranches: ["branch_9x"],
   allowedPostUpgradeCommands: ["./gradlew.*"],
   branchPrefix: "renovate-9x/",
+  commitMessageSuffix: " (branch_9x)",
   dryRun: "extract",
 };