test-net.c failure

test-net.c:79: Assert failed: strcmp(net_ip2addr(&ip), "::5") == 0 test-net.c:83: Assert failed: strcmp(net_ip2addr(&ip), "::5") == 0 net_ip2addr() ........................................................ : FAILED

Hello, Is it possible to disable DOVECOT_IPV6? We do not use IPv6 (and hope we shall never do on e-mails).