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>