diff --git a/vsnprintf.c b/vsnprintf.c
index f5652e7cec..d221e757bf 100644
--- a/vsnprintf.c
+++ b/vsnprintf.c
@@ -175,7 +175,9 @@ typedef	struct __sFILE {
 	short	_flags;		/* flags, below; this FILE is free if 0 */
 	short	_file;		/* fileno, if Unix descriptor, else -1 */
 	struct	__sbuf _bf;	/* the buffer (at least 1 byte, if !NULL) */
+#if 0
 	size_t	_lbfsize;	/* 0 or -_bf._size, for inline putc */
+#endif
 	int	(*vwrite)(/* struct __sFILE*, struct __suio * */);
 	const char *(*vextra)(/* struct __sFILE*, size_t, void*, long*, int */);
 } FILE;