1 files changed, 9 insertions, 7 deletions
diff --git a/lib/libc/stdio/setvbuf.c b/lib/libc/stdio/setvbuf.c
index 56d7196c..02928a35 100644
--- a/lib/libc/stdio/setvbuf.c
+++ b/lib/libc/stdio/setvbuf.c
@@ -1,5 +1,7 @@
-#include <io.h>
-#include <stdio.h>
+#include "stddef.h" // for NULL
+
+#include <libc.h>  // for __IMPL
+#include <stdio.h> // for _IONBF, FILE, _IOFBF, _IOLBF, setvbuf, size_t
 
 int setvbuf(FILE *restrict stream, char *restrict buf, int type, size_t size)
 {
@@ -8,13 +10,13 @@ int setvbuf(FILE *restrict stream, char *restrict buf, int type, size_t size)
 	if (type != _IONBF && (buf == NULL || size == 0))
 		return -1;
 
-	if (stream->fd < 0)
+	if (__IMPL(stream)->fd < 0)
 		return -1;
 
-	stream->buf = buf;
-	stream->buf_size = size;
-	stream->buf_pos = 0;
-	stream->type = type;
+	__IMPL(stream)->buf = buf;
+	__IMPL(stream)->buf_size = size;
+	__IMPL(stream)->buf_pos = 0;
+	__IMPL(stream)->type = type;
 
 	return 0;
 }