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-rw-r--r--block/qcow2-cluster.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 9ab445dd17..61d1ffd223 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -429,7 +429,7 @@ static int coroutine_fn do_perform_cow(BlockDriverState *bs,
 
     if (bs->encrypted) {
         Error *err = NULL;
-        int64_t sector = (cluster_offset + offset_in_cluster)
+        int64_t sector = (src_cluster_offset + offset_in_cluster)
                          >> BDRV_SECTOR_BITS;
         assert(s->cipher);
         assert((offset_in_cluster & ~BDRV_SECTOR_MASK) == 0);