diff --git a/apps/emqx_authz/src/emqx_authz_api_sources.erl b/apps/emqx_authz/src/emqx_authz_api_sources.erl
index e0d4667cb..784519d54 100644
--- a/apps/emqx_authz/src/emqx_authz_api_sources.erl
+++ b/apps/emqx_authz/src/emqx_authz_api_sources.erl
@@ -379,7 +379,7 @@ source(get, #{bindings := #{type := Type}}) ->
     end;
 source(put, #{bindings := #{type := <<"file">>}, body := #{<<"type">> := <<"file">>, <<"rules">> := Rules, <<"enable">> := Enable}}) ->
     {ok, Filename} = write_file(maps:get(path, emqx_authz:lookup(file), ""), Rules),
-    case emqx_authz:update({?CMD_REPLCAE, file}, #{<<"type">> => file, <<"enable">> => Enable, <<"path">> => Filename}) of
+    case emqx_authz:update({?CMD_REPLCAE, <<"file">>}, #{<<"type">> => <<"file">>, <<"enable">> => Enable, <<"path">> => Filename}) of
         {ok, _} -> {204};
         {error, Reason} ->
             {400, #{code => <<"BAD_REQUEST">>,