diff --git a/service/config/sample-secrets-bundle.yml b/service/config/sample-secrets-bundle.yml
index a24017343..92838f3f0 100644
--- a/service/config/sample-secrets-bundle.yml
+++ b/service/config/sample-secrets-bundle.yml
@@ -66,6 +66,7 @@ cdn.accessSecret: test # AWS Access Secret
 cdn3StorageManager.clientSecret: test
 
 unidentifiedDelivery.privateKey: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789AAAAAAA
+unidentifiedDelivery.rotated.privateKey: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789AAAAAAA
 
 keyTransparencyService.clientPrivateKey: |
   -----BEGIN PRIVATE KEY-----