diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index fe13671..1385425 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -435,7 +435,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
 			return struct_size;
 	}
 
-	if (!fdt_blocks_misordered_(fdt, mem_rsv_size, struct_size)) {
+	if (can_assume(LIBFDT_ORDER) |
+	    !fdt_blocks_misordered_(fdt, mem_rsv_size, struct_size)) {
 		/* no further work necessary */
 		err = fdt_move(fdt, buf, bufsize);
 		if (err)