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-rw-r--r--include/block/block_int.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h
index eb0598e580..63d54460e5 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -466,6 +466,7 @@ struct BdrvChildRole {
extern const BdrvChildRole child_file;
extern const BdrvChildRole child_format;
+extern const BdrvChildRole child_backing;
struct BdrvChild {
BlockDriverState *bs;