Need for re-index after pg_upgrade

Hi all.
 
In the man-page for pg_upgrade we see this:
pg_upgrade will require a reindex if:

* an index is of type hash or GIN

 
A bit further up we see:
All failure, rebuild, and reindex cases will be reported by pg_upgrade if they
affect your installation; post-upgrade scripts to rebuild tables and indexes
will be generated automatically.
 
I have several GIN-indexes and upgraded from 9.3 to 9.4 but no re-index
scripts were generated. Does this mean there's no need to rebuild the indexes
or just that I have to do it manually?
 
Thanks.
 
-- Andreas Joseph Krogh
CTO / Partner - Visena AS
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