diff -up ./procio.c.ori ./procio.c
--- ./procio.c.ori	2018-04-05 13:16:16.926741440 +0200
+++ ./procio.c	2018-04-05 13:16:31.076685287 +0200
@@ -24,7 +24,6 @@
 #endif
 #include <errno.h>
 #include <fcntl.h>
-#include <libio.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>