1 files changed, 5 insertions, 2 deletions
diff --git a/contrib/docker/README.md b/contrib/docker/README.md
index f4bc78908d..0da7b56628 100644
--- a/contrib/docker/README.md
+++ b/contrib/docker/README.md
@@ -87,9 +87,12 @@ Synapse specific settings:
 * ``SYNAPSE_REPORT_STATS``, set this variable to `yes` to enable anonymous
   statistics reporting back to the Matrix project which helps us to get funding.
 * ``SYNAPSE_RECAPTCHA_PUBLIC_KEY``, set this variable to the recaptcha public
-  key in order to enable recaptcha upon registration
+  key in order to enable recaptcha upon registration.
 * ``SYNAPSE_RECAPTCHA_PRIVATE_KEY``, set this variable to the recaptcha private
-  key in order to enable recaptcha upon registration
+  key in order to enable recaptcha upon registration.
+* ``SYNAPSE_TURN_URIS``, set this variable to the coma-separated list of TURN
+  uris to enable TURN for this homeserver.
+* ``SYNAPSE_TURN_SECRET``, set this to the TURN shared secret if required.
 
 Shared secrets, these will be initialized to random values if not set: