1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/config/jwt.py b/synapse/config/jwt.py
index 4cb092bbec..5c8199612b 100644
--- a/synapse/config/jwt.py
+++ b/synapse/config/jwt.py
@@ -30,6 +30,8 @@ class JWTConfig(Config):
 
     def default_config(self, **kwargs):
         return """\
+        # The JWT needs to contain a globally unique "sub" (subject) claim.
+        #
         # jwt_config:
         #    enabled: true
         #    secret: "a secret"