1 files changed, 1 insertions, 1 deletions
diff --git a/block/qcow2.h b/block/qcow2.h
index c90e5d6c6e..455e38de64 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -86,7 +86,7 @@ typedef struct QCowHeader {
 
     uint32_t refcount_order;
     uint32_t header_length;
-} QCowHeader;
+} QEMU_PACKED QCowHeader;
 
 typedef struct QCowSnapshot {
     uint64_t l1_table_offset;