--- hdrs/headers.h.orig	Tue Nov  9 20:42:41 1999
+++ hdrs/headers.h	Wed Mar 16 21:30:21 2016
@@ -16,6 +16,7 @@
 
 
 #include <stdio.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <signal.h>