In file included from ../../../../dev/ic/ath.c:113: ../../../../dev/ic/athvar.h:52:42: ../contrib/sys/dev/ic/athhal.h: No such file or directory This is not related to including IPsec code ("options IPSEC"). It seems that you do not have a complete source tree. You need src/contrib/sys as well as sys/. -- Greg Troxel <gdt@ir.bbn.com>