alter table .. reset not throwing an error if storage_parameter name is wrong

Hi,

I checked in PG 9.6  , if i provide any wrong storage parameter name
while doing alter table , reset is not
throwing an error :-

\\throwing error , expected
postgres=# alter table lon set (foo=10);
ERROR:  unrecognized parameter "foo"

\\working ?
postgres=# alter table lon reset (foo);
ALTER TABLE

--
regards,tushar