diff -Naur msr-old/msr.c msr-20060208/msr.c
--- msr-old/msr.c	1969-12-31 21:00:01.000000000 -0300
+++ msr-20060208/msr.c	2021-11-02 21:19:34.576722617 -0300
@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <unistd.h>