1 files changed, 3 insertions, 0 deletions
diff --git a/block/vhdx.c b/block/vhdx.c
index ed6fa53b87..67bbe103a1 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1049,6 +1049,9 @@ static int vhdx_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
 
     bdi->cluster_size = s->block_size;
 
+    bdi->unallocated_blocks_are_zero =
+        (s->params.data_bits & VHDX_PARAMS_HAS_PARENT) == 0;
+
     return 0;
 }