diff --git a/etc/emqx.conf b/etc/emqx.conf
index 10da1a0b9..60b576379 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -1895,6 +1895,7 @@ broker.session_locking_strategy = quorum
 ## Value: Enum
 ## - random
 ## - round_robbin
+## - sticky
 ## - hash
 broker.shared_subscription_strategy = random