diff --git a/sysutils/nsysctl/files/patch-opaque.c b/sysutils/nsysctl/files/patch-opaque.c
new file mode 100644
index 000000000000..36e3c67946f9
--- /dev/null
+++ b/sysutils/nsysctl/files/patch-opaque.c
@@ -0,0 +1,20 @@
+--- opaque.c.orig	2019-02-20 00:22:27 UTC
++++ opaque.c
+@@ -54,13 +54,17 @@
+ #include <assert.h>     //assert
+ #include <err.h>        //warnx
+ #include <errno.h>      //errno
++#if defined(__amd64__) || defined(__i386__)
+ #include <machine/pc/bios.h>
++#endif
+ #include <stdbool.h>
+ #include <stdio.h>      //printf
+ #include <stdlib.h>     //free
+ #include <string.h>     //strdup
+ #include <unistd.h>     //getpagesize
++#if defined(__amd64__) || defined(__i386__)
+ #include <x86/metadata.h>
++#endif
+ 
+ #include <libxo/xo.h>
+ #include <sysctlmibinfo.h>