new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_freebsd_config.h
@@ -0,0 +1,124 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_FREEBSD_CONFIG_H_INCLUDED_
+#define _NGX_FREEBSD_CONFIG_H_INCLUDED_
+
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <stddef.h>             /* offsetof() */
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+#include <pwd.h>
+#include <grp.h>
+#include <dirent.h>
+
+#include <sys/uio.h>
+#include <sys/filio.h>          /* FIONBIO */
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <sys/wait.h>
+#include <sys/mman.h>
+#include <sys/resource.h>
+#include <sched.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include <libutil.h>            /* setproctitle() before 4.1 */
+#include <osreldate.h>
+#include <sys/sysctl.h>
+#include <netinet/tcp.h>        /* TCP_NOPUSH */
+
+
+#if __FreeBSD_version < 400017
+
+#include <sys/param.h>          /* ALIGN() */
+
+/* FreeBSD 3.x has no CMSG_SPACE() at all and has the broken CMSG_DATA() */
+
+#undef  CMSG_SPACE
+#define CMSG_SPACE(l)       (ALIGN(sizeof(struct cmsghdr)) + ALIGN(l))
+
+#undef  CMSG_DATA
+#define CMSG_DATA(cmsg)     ((u_char *)(cmsg) + ALIGN(sizeof(struct cmsghdr)))
+
+#endif
+
+
+#include <ngx_auto_config.h>
+
+
+#ifndef HAVE_SELECT
+#define HAVE_SELECT  1
+#endif
+
+
+#ifndef HAVE_POLL
+#define HAVE_POLL  1
+#endif
+#if (HAVE_POLL)
+#include <poll.h>
+#endif
+
+       /* FreeBSD aio supported via kqueue */
+
+#if (__FreeBSD__ == 4 && __FreeBSD_version >= 430000) \
+    || __FreeBSD_version >= 500014
+
+#ifndef HAVE_AIO
+#define HAVE_AIO  1
+#endif
+
+#endif
+
+#if (HAVE_AIO)
+#include <aio.h>
+#endif
+
+
+#if defined SO_ACCEPTFILTER && !defined HAVE_DEFERRED_ACCEPT
+#define HAVE_DEFERRED_ACCEPT  1
+#endif
+
+
+#if (HAVE_KQUEUE)
+#include <sys/event.h>
+#endif
+
+
+#if (__FreeBSD_version < 430000 || __FreeBSD_version < 500012)
+
+pid_t rfork_thread(int flags, void *stack, int (*func)(void *arg), void *arg);
+
+#endif
+
+#ifndef IOV_MAX
+#define IOV_MAX   1024
+#endif
+
+
+#ifndef HAVE_INHERITED_NONBLOCK
+#define HAVE_INHERITED_NONBLOCK  1
+#endif
+
+
+#define ngx_setproctitle  setproctitle
+
+
+extern char *malloc_options;
+
+
+#endif /* _NGX_FREEBSD_CONFIG_H_INCLUDED_ */