diff --git a/apps/iot/src/http_handler/http_host_handler.erl b/apps/iot/src/http_handler/http_host_handler.erl
index 74f99bf..d5386e8 100644
--- a/apps/iot/src/http_handler/http_host_handler.erl
+++ b/apps/iot/src/http_handler/http_host_handler.erl
@@ -192,7 +192,7 @@ handle_request(_, Path, _, _) ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %% 追加service_name参数
-append_service_name(#{<<"serivce_name">> := ServiceName}, Reply) when is_binary(ServiceName), ServiceName =/= <<"">> ->
+append_service_name(#{<<"service_name">> := ServiceName}, Reply) when is_binary(ServiceName), ServiceName =/= <<"">> ->
     Reply#{<<"to">> => ServiceName};
 append_service_name(_, Reply) ->
     Reply.
\ No newline at end of file