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-rw-r--r--src/stdio/vfprintf.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 5e7be717..af069d13 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -674,9 +674,9 @@ int vfprintf(FILE *restrict f, const char *restrict fmt, va_list ap)
 	if (f->mode < 1) f->flags &= ~F_ERR;
 	if (!f->buf_size) {
 		saved_buf = f->buf;
-		f->wpos = f->wbase = f->buf = internal_buf;
+		f->buf = internal_buf;
 		f->buf_size = sizeof internal_buf;
-		f->wend = internal_buf + sizeof internal_buf;
+		f->wpos = f->wbase = f->wend = 0;
 	}
 	ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
 	if (saved_buf) {