diff -purN a/os.h b/os.h
--- a/os.h	2015-08-17 08:42:52.000000000 -0500
+++ b/os.h	2020-09-07 20:24:21.068177123 -0500
@@ -177,7 +177,7 @@
 #elif defined (__linux__)             /* L I N U X */
 #include <stdio.h>
 #include <sys/param.h>
-#include <sys/sysctl.h>
+#include <sysctl.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <unistd.h>