diff --git a/deps/rabbit/src/rabbit_quorum_queue.erl b/deps/rabbit/src/rabbit_quorum_queue.erl
index 9328d61ec579..605a8390eb51 100644
--- a/deps/rabbit/src/rabbit_quorum_queue.erl
+++ b/deps/rabbit/src/rabbit_quorum_queue.erl
@@ -1353,7 +1353,7 @@ add_member(Q, Node, Membership, Timeout) when ?amqqueue_is_quorum(Q) ->
                     Fun = fun(Q1) ->
                                   Q2 = update_type_state(
                                          Q1, fun(#{nodes := Nodes} = Ts) ->
-                                                     Ts#{nodes => [Node | Nodes]}
+                                                     Ts#{nodes => lists:usort([Node | Nodes])}
                                              end),
                                   amqqueue:set_pid(Q2, Leader)
                           end,