At least two places in OpenSIPS where "use UNIVERSAL" is used: At least two places in Kamailio where "use UNIVERSAL" is used: modules/app_perl/lib/perl/Kamailio/LDAPUtils/LDAPConnection.pm 55:use UNIVERSAL qw( isa ); if( isa($conf ,"Kamailio::LDAPUtils::LDAPConnection") ) { modules/app_perl/lib/perl/Kamailio/VDB.pm 48:use UNIVERSAL qw ( can ); 90: if (can($pkg, $3)) { 92: } elsif (can($v, "init")) { 95: } elsif (can($v, "new")) { This should be fixed as according to this document it will throw a fatal error starting with Perl 5.22: http://search.cpan.org/~shay/perl-5.21.11/pod/perl5213delta.pod#use%C2%A0UN… --- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/516