diff --git a/apps/iot/src/http_handlers/endpoint_handler.erl b/apps/iot/src/http_handlers/endpoint_handler.erl
index 9e19ade..5be9f1c 100644
--- a/apps/iot/src/http_handlers/endpoint_handler.erl
+++ b/apps/iot/src/http_handlers/endpoint_handler.erl
@@ -78,11 +78,11 @@ handle_request("POST", "/endpoint/restart", _, #{<<"id">> := Id}) when is_intege
                                     lager:warning("[endpoint_handler] start endpoint: ~p, get error: ~p", [Title, Reason]),
                                     {ok, 200, iot_util:json_error(404, <<"restart endpoint error">>)}
                             end;
-                        Pid ->
+                        Pid when is_pid(Pid) ->
                             case endpoint_sup:delete_endpoint(Id) of
                                 ok ->
                                     case endpoint_sup:ensured_endpoint_started(Endpoint) of
-                                        {ok, Pid} when is_pid(Pid) ->
+                                        {ok, Pid0} when is_pid(Pid0) ->
                                             {ok, 200, iot_util:json_data(<<"success">>)};
                                         {error, Reason} ->
                                             lager:warning("[endpoint_handler] start endpoint: ~p, get error: ~p", [Title, Reason]),