Added description for "SYNAPSE_MAX_UPLOAD_SIZE" variable.

1 files changed, 1 insertions, 1 deletions

diff --git a/docker/README.md b/docker/README.md

index ecdf8a8b17..3c00d1e948 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -88,7 +88,7 @@ variables are available for configuration:
 * ``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.
-* ``SYNAPSE_MAX_UPLOAD_SIZE``, the max upload size [default `10M`].
+* ``SYNAPSE_MAX_UPLOAD_SIZE``, set this variable to change the max upload size [default `10M`].
 
 Shared secrets, that will be initialized to random values if not set: