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-rw-r--r--src/stdio/setvbuf.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/stdio/setvbuf.c b/src/stdio/setvbuf.c
index 2985d3f1..6dea0ebf 100644
--- a/src/stdio/setvbuf.c
+++ b/src/stdio/setvbuf.c
@@ -14,9 +14,11 @@ int setvbuf(FILE *f, char *buf, int type, size_t size)
 	f->lbf = EOF;
 
 	if (type == _IONBF)
-		f->buf_size = 1;
+		f->buf_size = 0;
 	else if (type == _IOLBF)
 		f->lbf = '\n';
 
+	f->flags |= F_SVB;
+
 	return 0;
 }