diff --git a/dendrite-config.yaml b/dendrite-config.yaml
index c27cbf81c..b71fb5091 100644
--- a/dendrite-config.yaml
+++ b/dendrite-config.yaml
@@ -42,9 +42,9 @@ global:
   # 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:
-  - private_key: old_matrix_key.pem
-    expired_at: 1601024554498
+  # old_private_keys:
+  # - private_key: old_matrix_key.pem
+  #   expired_at: 1601024554498
 
   # 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