Maia Mailguard amavis Error in config file

/etc/init.d/amavis restart
Shutting down virus-scanner (amavisd-new):Error in config file "/etc/amavisd.conf": Global symbol "@decoders" requires explicit package name at /etc/amavisd.conf line 220.
                                                                      failed
Starting virus-scanner (amavisd-new):Error in config file "/etc/amavisd.conf": Global symbol "@decoders" requires explicit package name at /etc/amavisd.conf line 220.
                                                                      done

/etc/amavisd.conf
@decoders = (  →　my @decoders = (　に変更