diff --git a/README.md b/README.md
index 3c6e07f..b2e2785 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@
 ### Disabling federation
 
 > We're not sure this does it exactly and there is still a discussion running
-> upstrem about whether this is the right way to do it & whether it could be
+> upstream about whether this is the right way to do it & whether it could be
 > more convenient. We welcome issues / change sets to close up more federation
 > functionality.
 
@@ -40,6 +40,8 @@ See [`#27`](https://git.coopcloud.tech/coop-cloud/matrix-synapse/pulls/27) for m
 
 Depending on your setup, using `SERVE_SERVER_WELLKNOWN=true` might work to start federating.
 
+Make sure you don't leave `DISABLE_FEDERATION=1` set!
+
 ### Seeing what changed in `homeserver.yaml` between versions
 
 Change the version range to suit your needs.