diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index c5898c59d411..2423e905ec1a 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -6415,7 +6415,7 @@ static int ocfs2_reflink_xattr_header(handle_t *handle,
 		 * and then insert the extents one by one.
 		 */
 		if (xv->xr_list.l_tree_depth) {
-			memcpy(new_xv, &def_xv, sizeof(def_xv));
+			memcpy(new_xv, &def_xv, OCFS2_XATTR_ROOT_SIZE);
 			vb->vb_xv = new_xv;
 			vb->vb_bh = value_bh;
 			ocfs2_init_xattr_value_extent_tree(&data_et,