1 files changed, 2 insertions, 1 deletions
diff --git a/contrib/docker/README.md b/contrib/docker/README.md
index 221d9c53b5..25c358c847 100644
--- a/contrib/docker/README.md
+++ b/contrib/docker/README.md
@@ -111,6 +111,8 @@ variables are available for configuration:
 * ``SYNAPSE_SERVER_NAME`` (mandatory), the current server public hostname.
 * ``SYNAPSE_REPORT_STATS``, (mandatory, ``yes`` or ``no``), enable anonymous
   statistics reporting back to the Matrix project which helps us to get funding.
+* ``SYNAPSE_MACAROON_SECRET_KEY`` (mandatory) secret for signing access tokens
+  to the server, set this to a proper random key.
 * ``SYNAPSE_NO_TLS``, set this variable to disable TLS in Synapse (use this if
   you run your own TLS-capable reverse proxy).
 * ``SYNAPSE_ENABLE_REGISTRATION``, set this variable to enable registration on
@@ -130,7 +132,6 @@ Shared secrets, that will be initialized to random values if not set:
 
 * ``SYNAPSE_REGISTRATION_SHARED_SECRET``, secret for registrering users if
   registration is disable.
-* ``SYNAPSE_MACAROON_SECRET_KEY``, secret for Macaroon.
 
 Database specific values (will use SQLite if not set):