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-rw-r--r--block-qcow2.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block-qcow2.c b/block-qcow2.c
index 577210b21a..30c13f376d 100644
--- a/block-qcow2.c
+++ b/block-qcow2.c
@@ -191,7 +191,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
int len, i, shift, ret;
QCowHeader header;
- ret = bdrv_file_open(&s->hd, filename, flags);
+ ret = bdrv_file_open(&s->hd, filename, flags | BDRV_O_AUTOGROW);
if (ret < 0)
return ret;
if (bdrv_pread(s->hd, 0, &header, sizeof(header)) != sizeof(header))