diff --git a/apps/emqx/src/emqx_rpc.erl b/apps/emqx/src/emqx_rpc.erl
index ec8fd83de..961bfd5d6 100644
--- a/apps/emqx/src/emqx_rpc.erl
+++ b/apps/emqx/src/emqx_rpc.erl
@@ -124,7 +124,7 @@ filter_result(Delivery) ->
 max_client_num() ->
     emqx:get_config([rpc, tcp_client_num], ?DefaultClientNum).
 
--spec unwrap_erpc(emqx_rpc:erpc(A)) -> A | {error, _Err}.
+-spec unwrap_erpc(emqx_rpc:erpc(A) | [emqx_rpc:erpc(A)]) -> A | {error, _Err} | list().
 
 unwrap_erpc(Res) when is_list(Res) ->
     [unwrap_erpc(R) || R <- Res];
diff --git a/apps/emqx_management/src/proto/emqx_management_proto_v3.erl b/apps/emqx_management/src/proto/emqx_management_proto_v3.erl
index 9c9b71012..937a948e5 100644
--- a/apps/emqx_management/src/proto/emqx_management_proto_v3.erl
+++ b/apps/emqx_management/src/proto/emqx_management_proto_v3.erl
@@ -45,11 +45,11 @@ introduced_in() ->
 unsubscribe_batch(Node, ClientId, Topics) ->
     rpc:call(Node, emqx_mgmt, do_unsubscribe_batch, [ClientId, Topics]).
 
--spec node_info([node()]) -> emqx_rpc:multicall_result().
+-spec node_info([node()]) -> emqx_rpc:erpc_multicall(map()).
 node_info(Nodes) ->
     erpc:multicall(Nodes, emqx_mgmt, node_info, [], 30000).
 
--spec broker_info([node()]) -> emqx_rpc:multicall_result().
+-spec broker_info([node()]) -> emqx_rpc:erpc_multicall(map()).
 broker_info(Nodes) ->
     erpc:multicall(Nodes, emqx_mgmt, broker_info, [], 30000).