diff -ruN a/newlib/libc/stdio/fvwrite.h b/newlib/libc/stdio/fvwrite.h
--- a/newlib/libc/stdio/fvwrite.h	2007-03-15 19:40:48.000000000 +0100
+++ b/newlib/libc/stdio/fvwrite.h	2013-10-31 09:33:43.917907668 +0100
@@ -28,7 +28,7 @@
 struct __suio {
 	struct	__siov *uio_iov;
 	int	uio_iovcnt;
-	int	uio_resid;
+	size_t	uio_resid;
 };