diff --git a/priv/emqx.schema b/priv/emqx.schema
index cc616f2e8..832136807 100644
--- a/priv/emqx.schema
+++ b/priv/emqx.schema
@@ -373,6 +373,11 @@ end}.
 , {datatype, {enum, [tcp, ssl]}}
 ]}.
 
+{mapping, "rpc.default_client_driver", "gen_rpc.default_client_driver",
+[ {default, tcp}
+, {datatype, {enum, [tcp, ssl]}}
+]}.
+
 {mapping, "rpc.tcp_server_port", "gen_rpc.tcp_server_port", [
   {default, 5369},
   {datatype, integer}