Hi, I just downloaded a fresh Jessie64 and failed building Freeswitch v1.6 with SCTP. Seems maybe SCTP just isn't supported right now or ...? Are there any configurations where this works? $ vagrant init debian/jessie64 $ vagrant up $ vagrant ssh Follow https://freeswitch.org/confluence/display/FREESWITCH/Debian+8+Jessie ... $ git checkout v1.6 # https://freeswitch.org/stash/projects/FS/repos/freeswitch/commits/96eca8abb1... $ ./bootstrap.sh -j $ ./configure --enable-sctp --prefix=... ... Making all in tport make[8]: Entering directory '/home/vagrant/freeswitch/libs/sofia-sip/libsofia-sip-ua/tport' make all-am make[9]: Entering directory '/home/vagrant/freeswitch/libs/sofia-sip/libsofia-sip-ua/tport' LTCOMPILE tport.lo LTCOMPILE tport_logging.lo LTCOMPILE tport_stub_sigcomp.lo LTCOMPILE tport_type_udp.lo LTCOMPILE tport_type_tcp.lo LTCOMPILE tport_type_sctp.lo tport_type_sctp.c: In function 'tport_sctp_init_socket': tport_type_sctp.c:206:10: error: variable 'initmsg' has initializer but incomplete type struct sctp_initmsg initmsg = { 0 }; ^ tport_type_sctp.c:206:10: error: excess elements in struct initializer [-Werror] tport_type_sctp.c:206:10: error: (near initialization for 'initmsg') [-Werror] tport_type_sctp.c:206:23: error: storage size of 'initmsg' isn't known struct sctp_initmsg initmsg = { 0 }; ^ tport_type_sctp.c:211:36: error: 'SCTP_INITMSG' undeclared (first use in this function) if (setsockopt(socket, SOL_SCTP, SCTP_INITMSG, &initmsg, sizeof initmsg) < 0) ^ tport_type_sctp.c:211:36: note: each undeclared identifier is reported only once for each function it appears in tport_type_sctp.c:206:23: error: unused variable 'initmsg' [-Werror=unused-variable] struct sctp_initmsg initmsg = { 0 }; ^ cc1: all warnings being treated as errors