diff -uNr hwinfo-21.60/src/hd/sys.c hwinfo-21.60.mod/src/hd/sys.c
--- hwinfo-21.60/src/hd/sys.c	2018-10-17 16:23:47.000000000 +0300
+++ hwinfo-21.60.mod/src/hd/sys.c	2019-06-26 13:35:17.695345306 +0300
@@ -9,7 +9,8 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #if defined(__i386__) || defined (__x86_64__)
-#include <sys/io.h>
+#include <sys/syscall.h>
+#define iopl(level) ((int)syscall(SYS_iopl, level))
 #endif
 
 #include "hd.h"
