diff --git a/src/os/unix/ngx_freebsd.h b/src/os/unix/ngx_freebsd.h
new file mode 100644
index 0000000..f666a6f
--- /dev/null
+++ b/src/os/unix/ngx_freebsd.h
@@ -0,0 +1,16 @@
+#ifndef _NGX_FREEBSD_H_INCLUDED_
+#define _NGX_FREEBSD_H_INCLUDED_
+
+
+ngx_chain_t *ngx_freebsd_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in);
+
+
+extern int ngx_freebsd_kern_osreldate;
+extern int ngx_freebsd_hw_ncpu;
+extern int ngx_freebsd_net_inet_tcp_sendspace;
+extern int ngx_freebsd_sendfile_nbytes_bug;
+extern int ngx_freebsd_kern_ipc_zero_copy_send;
+extern int ngx_freebsd_use_tcp_nopush;
+
+
+#endif /* _NGX_FREEBSD_H_INCLUDED_ */