--- ptunnel-0.61.orig/ptunnel.c 2005-07-13 11:57:27.000000000 +0200 +++ ptunnel-0.61/ptunnel.c 2013-12-28 18:21:38.000000000 +0100 @@ -43,7 +43,7 @@ #include "ptunnel.h" #include <pthread.h> #include <stdarg.h> -#include <sys/unistd.h> +#include <unistd.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h>