--- a/dendrite/server/templates/dendrite.yaml.j2	Sat Jul 24 22:12:04 2021 -0500
+++ b/dendrite/server/templates/dendrite.yaml.j2	Sun Jul 25 10:30:51 2021 -0500
@@ -44,9 +44,10 @@
   # to old signing private keys that were formerly in use on this domain. These
   # keys will not be used for federation request or event signing, but will be
   # provided to any other homeserver that asks when trying to verify old events.
-  old_private_keys:
+  {% if dendrite_old_key %}old_private_keys:
   - private_key: old_matrix_key.pem
     expired_at: 1626538450
+{% endif %}
 
   # How long a remote server can cache our server signing key before requesting it
   # again. Increasing this number will reduce the number of requests made by other