--- 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>
